It is impossible to sex them so a group will be necessary to breed them. Family: Mytiloidae, What do these Quick Stats mean? Breeding & raising Mystery snails (Pomacea diffusa). They can happily live in freshwater but not reproduce, which is good for an aquarium and for the surrounding environment, as they cannot replace in any way the local population of snails if they escape. Note that for this way of selection to work the Nerite snail must be sexually mature or at least 1 year old. Once they have adjusted to new conditions in the aquarium, they become extremely robust and hardy enough. Interesting fact: snails can be awake for 30+ hours with clusters of around seven bouts of sleeping over a 13-15 hour period. According to the study, Neritina zebra has a mixed development (Come on!). Very clunky in their movements and fun to watch. In fact, they can take even warmer temperatures (not extreme of course). Eventually, Nerite snails will deal with this problem and if you have lots of them, it will become problematic to feed them later. Of course, it depends on the conditions of your tank. The magic number is… Just like the old “inch-per-gallon” rule that is still floating around for fish, there are some stocking guidelines for clean-up crews. Some aquarists say that their Nerite snails lived up to 5 years. By Guesty, 3 years ago on General Freshwater Questions. Based on the larval ecology of benthic invertebrates, there are three main types of development: At a salinity of 5 ppt the capsules released veligers, after 21 days. There are many species of Nerite Snails. Freshwater planted shrimp tank. It can suck them up. Read it here, Hydra (you can read my articles about all these parasites), List of Freshwater Aquarium Snails. Black Racer Nerite Snails' shells are a gleaming ebony that add a sophisticated beauty to your aquarium while also serving some very useful purposes. Well, this is another mystery. we were given 2 assassin snails and theres been no themes. It is fresh water. Frankly saying, there is no difference in hardiness. First off unlike other snails Nerites are not Hermaphrodite, they are male and female. I apologize for the confusion, I was a bit overexcited. Give them a small piece of bogwood as this is the preffered place for them to lay eggs. Rabbit snails are another slightly larger species of snail, unlike … 5 Boesemani Rainbows Pretty fast!) I'm thinking I can put them in the current tank that will be used as a QT for the next batch of fish I will eventually add to the big tank. The egg capsules have an oval shape and extremely small (1-1.5mm long and about 1mm wide). 3. please recommend. The basic colors range between an intense golden-yellow and light brown, and from greenish-yellow to yellowish-brown. Your email address will not be published. There are various types of nerites and while some require fully marine conditions throughout their lives, there are several tha do well in fresh water. Normal water parameters for Neocardinia. Note: Nerite snails eat a lot and poop quite a bit. Read it here. Golden Pearls (5-50 Microns) (link to see the price on Amazon). So, do not think that they will feel lonely. Second, their bioload will affect water parameters very fast (for such a small volume of water). Estuarine species (estuaries form a transition zone between river environments and maritime environments), for example, such as. Tank size Guess I will just bookmark this site. Tiger nerite snail has a dark amber color with small black markings (the patterns resemble tiger stripes) that form encircling stripes. I am fishless cycling my new 120 gallon and will be moving my current fish to their new larger home (from a 45 gallon cube). The sex of the Nerita Snail can be determined if there are numerous individuals of the same age kept in the same environment and fed the same foods. These spikes often break, but it does not affect the well-being of the snail. Michael. That is why I will refer to the study of Neritina zebra snail. The minimum tank size for a nerite snail is a 10 gallon tank. Best regards, I have never heard about it. Are they the same Species? The reason i have these is to keep algae and leftover food in control. Under low temperatures, their metabolism slows down, they eat and move less. It took me some time to find the scientific name of Black Racer nerite snail and, actually, I am not 100% sure that it is right. (The eggs are … This is absolutely not possible. thanks for you I have only 1 nerite snail in my 3 gallon tank and have many egg capsules being deposited on a regular basis on my artificial drift wood. You do not need a big one, 1-5 gallons tank is enough. So, if you are interested in getting into this hobby or just want some extra tips and tricks, well this is the right place for you. You can use this trick to feed them more efficiently. Pieces of limestone are also good in a tank wih nerites. The 2 males constantly have the breeding stripe going so they are named Blaze and Flash . Please post a new thread an include the following information Awesome blog article.Really looking forward to read more. Snails produce a lot of waste but, it's my understanding that they dont have a very big "carbon footprint," that's one of the reasons we dont use snails to cycle tanks. 4. Olive nerite snail. There are about 3785 cc in a gallon, so in 10 gallons there are 37,850 cc. Interesting fact: they are the fastest crawlers compared to all other types of Nerite Snails. 5 Weather Loaches, I plan on getting 1 more Angelfish and some more Weather Loaches. I'd say one snail per 10 gallons would be enough for starters, based in my experience. In some places, aquarists also call it “Black marble snail”. . But i would not recommend adding others due to the low amount of algae growth in such a small tank. I believe that this is the first article (of that size) on the Internet based on different studies. Do not forget to acclimate any Nerite snail (the same way as shrimp) before putting them in the tank. A lot of things contradict each other. Scrub the eggs with a razor blade. Ford (1979) suggested a 10-year lifespan”. Phytoplankton (Tetraselmis) (link to see the price). Most of these people are probably not around anymore. The Nerita Snail is a popular choice for keeping uneaten food and algae in check. So, what are the ideal water parameters for fish and/or shrimp keeping? Also, should I wait for some algae or diatoms to grow before getting them? Wondershells will buffer your water and increase calcium quickly. but the reason why i got nerites is because i heard they dont reproduce.. Nassarius snails are generally kept at one per three gallons, but they depend more on the area of the substrate. It is sleeping or resting. In general, I am not talking about Nerite snails, some snail can crossbreed. Zebra nerite laying eggs – I can see the eggs being released under the snail through the glass. I bought two nerite snails. The capsules also have a thin membrane surrounding the eggs. © 2020 Copyright Shrimp and Snail Breeder, Now, I am not going to list all types of Nerite snails, there are simply too many of them (, Zebra nerite snails (Neritina natalensis Zebra), Horned nerite snails (Neritina Clithon corona), Black (Red, Gold) Racer nerite snails (Neritina pulligera, Vittina waigiensis), Red Spotted nerite snails (Neritina natalensis sp, Species-Dependent (huge variety of colors. At first, the egg capsules have a yellowish color when deposited. I’ve waited to comment again to be positive, they were definitely Nerites but there are only 2, so it was either a fluke or they were included in the previous Nerite order. They will be great neighbors in any shrimp tank. According to one of the studies, “Nerites identification is still in the very complicated problem to solve. The Ideal Water Parameters for Fish and Shrimp Keeping. BUT just last night i noticed i very tiny little guy crawling next to his/her parents. How many would be good for a 120 gal? When they are dead, they start smelling really bad. Honestly, I have not seen anything like that anywhere. You will damage them. If you have more questions about snails, check out my article “30 Frequently Asked Questions about Snails in Freshwater Tanks. - one snail per approximately 5G is a good ballpark. It can be absolutely anything that you can safely move (a leaf of the plant, a stone, a piece of decoration, etc). Surprise! If you are buying them for algae control, the general rule is 1 snail per 5-10 gallons (~20-40 liters). How Many Mystery Snail Per Gallon? Although all species of the family Neritidae deposit their eggs in characteristic capsules, there are differences in reproductive strategies between species. Other than that, consider incorporating a filter in your tank. Haaa, One per gallon is alot!! At a salinity of 15 ppt, development was slower than at 5, and after 25 days, despite having well-formed veligers, they did not hatch at all. 2. It is just too hard to breed them even without these conditions. In some cases, it will take dozens of years for the snail to cross this distance. Nerite snail will not reproduce and overpopulate your tank. The Nerita Snail should not be housed with any other animals that would like to make a meal of them. Nerite snails will make the slices, roots, plant leaves, and decoration items spotlessly clean. They are simply too small. An average length is about 2.5 to 3 cm, which makes it one of the most impressive snails. The snails’ poop has bacteria that is good for the digestive system of the shrimp. Unlike some other common aquarium snails, they do not reproduce in freshwater aquaria. No more than two snails for every ten gallons of water will be perfect. In the past, more than once aquarists have seen similar examples. You can keep 1 or 2 snails for every 5 gallons. Click here. Almost 70 planktonic larvae can fit into 1,5 mm!). While crushed coral or cuttlebone will erode more slowly over time to help keep it stable. Thanks for the info that they can actually breed in freshwater. The optimal pH range is between 7 and 8 and they definitely prefer harder water. These spikes often break, but it does not affect the well-being of the snail. 5.9K views View 5 Upvoters Nerite snail will not reproduce and overpopulate. They do not have an effect on the water. The good, the bad & the assassin snails!!! Best regards, Im looking at the positive side - if they are reproducing it means my tank has cycled well and everything is in control and happy for the ones inside. Biologist observed that Neritina zebra has intracapsular and planktonic larval stages. In which case, females will be larger than males. I would not move 5-6 nerite snails in a 1-gallon tank. One month after we got a zebra nerite and the red nerite with dots we had 12. 2. Ok, I have been specialising in Nerites for quite a few years now so please allow me to clarify matters. In order to reproduce, the Nerita Snail requires brackish water as it has a marine larval stage. How is this possible from what I’ve read??!!! Lecithotrophic: when non-feeding larvae will metamorphose after a period of a few hours or days in the plankton; Michael. Their antennae are very short which is a good bonus; if you want to keep them with fish, (they will not attract fish to nip at them). Nerites will happily lay eggs and the eggs will hatch in fresh water, BUT, and here is the problem, the hatchlings will not survive as they need brackish at the least, preferably marine conditions to survive the early stages of life. 1. Different nerites can be kept together without any problems, even the more intimidating horned species is peaceful. Hope this helps. The capsules opened 24 or 48 h after this salinity change releasing the veligers. Maybe it also belongs to Vittina waigiensis species. Intracapsular metamorphosis which occurs before hatching. Acclimate them the same as you would a fish. Freshwater neritids (Mollusca: Gastropoda) of tropical islands, amphidromy as a life cycle, a review, Such migrations of freshwater neritids were reported for example in Hawaii, Costa Rica, French Polynesia and Puerto Rico… until finding adult habitat. " In ideal conditions some of them specialize as males and others as females but they can easily switch. Yes, they are a little bit fussy in that sense but all in all Nerite snails are a very popular choice for keeping uneaten food and algae in check. I have read lots of official reports and studies, Internet articles, guides and forums about Nerite snails. Nerite snails do not reproduce in freshwater. By the way 79 degrees is the optimum temp for them to reproduce. Michael. If you are buying them for algae control, the general rule is 1 snail per 5-10 gallons (~20-40 liters). Leave the lights on for 24 h (you need algae for the larvae to support them). Here are some good combinations of tetras, other fish, shrimps and snails that can be kept in 5, 10 or 20 gallons tank: 5 gallon/ 19 liters 5 gallon tanks are small so your choice is pretty much limited. Each capsule has, on average, 68 eggs (ranging from 32-106). The snail will grow up to 1/2 – 2/3 inch (1,2-2 cm). You can mechanically scrub the eggs of a Nerite snail by using some sort of tool. After al... Is 4 nerite snails 6 trochus snails and 7 nassurias snails good enough for ... Salt water and Snails! On this blog, I share all the things I learn about shrimp breeding as I go. Ever. Hi Cedric Beresford, 2 of the Turquoise RB's are definitely males and I think the others are females so will not add anymore there. Zebra nerite snails I have to Zebra snails and two Mystery snails. By Jay_S. I think I will start out with about 8 and see how that goes!! They are also voracious algae eaters. There is no rush. Zebra Nerite Snails for at least a year growing to a maximum size of 1". overview its also got some of that stringy green algae too. 1. leave thema alone and maybe 20% will survive. Current fish: As are other snails of the same genus, which inhabit environments with a strong freshwater influence. the small spikes protruding from the front of the shell. They occur naturally in Florida and often move between freshwater and marine environments. The largest specimens of this species are less than an inch across. They need brackish water to hatch. There can be big light ridges at the base of the shell. Nerites left upside down can die that way. I have hard water and my pH is 7.2 - 7.4. More and more people ought to read this and understand this side of the story. Thus, they will never overpopulate your tank. Some snails will lay eggs for a while and then stop completely. They just keep working as fast as snails can do. Anyway, I do not want to start another Internet “holy war” here. If you are buying them for algae control, the general rule is 1 per 5-10 gallons although I have heard some people recommend 1 per gallon but that seems a bit excessive. However, the most popular ones in this hobby: Have you noticed that in articles authors usually use common and scientific name when they talk about shrimp or fish? Applause, please. Hi Melody, Very useful information specifically the last part I care for such information a lot. These snails move fast and work over the entire tank daily. I am glad I was able to help! Zebra nerite snail. Well, this is not correct! You said: “move the item with egg capsules to the rearing tank.” What item are you referring to? Horned nerite snails. Unlike some other snails, Nerites are not hermaphrodite. Nerites sell for about $5 each around here, so filling your aquarium with nerites will cost you about $94,000 although you should get a volume discount for buying that many. Therefore, lure them to a spot with a flashlight or adjustable lamp to the corner of the aquarium. QUICK STATS I set up a new 55g planted tank 1 month ago, I put 3 Nerites in it to control the algae while it cycles and now I have egg capsules everywhere and a dozen nanoNerites, they are growing fast , 1 is almost a quarter inch already. That would be really cool and revolutionary in the biology of Nerite snails. Of course, it depends on the conditions of your tank and how many algae you have. Nerite snails lay eggs on the glass spread our like corydoras almost, not in a mass. What about Nerite snails? The snail will grow up to 1/2 – 2/3 inch (1,2-2 cm). If you have a filter an heater I had read they will lay eggs but that was all I found (before falling asleep!!). However, your shrimp will love that! Michael, Your email address will not be published. Your style is really unique compared to other people I’ve read stuff from. In nature, they live mainly on hard substrates such as rocks and driftwood. (Of course they are! Nerite snails are used to changing water levels, so they can live without any problems in the freshwater and brackish water aquariums. This is the recommended size for one nerite snail and should be increased if you plan on adding more. I am trying to add few nerite snails to my 55 gallon tank. If there is not enough algae present in the aquarium, the diet can be supplemented with algae wafers or blanched vegetables such as zucchini or carrots (read my article how to blanch vegetables) . Zebra nerite snail and other kinds have rather short lifespan – about a year. Frankly saying, I do not think that anybody can prove or disprove this hypothesis. Nerite snails will accept the water temperature range from 65 to 85 degrees Fahrenheit. When you want that. Even... Coral mortality is a huge problem in the captive care of corals, and many hobbyists are puzzled by the sudden death of their corals which seemed to be doing perfectly fine. Their size may vary depending on the kind, but is average size is about 2 cm. Either way you need to leave them until their shells become shiny (crushed coral in the tank will give them the calcium they need to develop healthy shells quickly). If yours is a ten-gallon one, a maximum of three nerite snails will do. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to,, and and other Affiliate programs. Like all Nerite snails, these snails clean algae off of glass, plants, and decorations, they eat hair algae, and they keep your substrate clean and the correct color. If the situation is totally out of control (as if you do not see the opposite side of your tank), aquarists recommend keeping 1 Nerite snail per 1-3 gallons (~10 liters). The coloring may vary – it can be black, dark brown, dark green, olive etc. If you disagree, you can throw stones at them. In my opinion, there are three main reasons why aquarists have a hard time doing it. Larvae should not produce a lot bioload. Tank Requirements What Should be The Tank Size? Do you know why? For this reason it is wise to stock no more than one snail for every 5 gallons of aquarium water. After mating, the females deposit egg capsules on any available substratum such as driftwood, leaves, including shells of other snails. This is a 2 year old thread and nerite snails need brackish water for the eggs to hatch, you don't have nerite snails. Nerite Snails in 3 Gallons? They hatch as planktotrophic veligers larvae, and they can show amphidromic behavior. Just think about it. They can happily live in freshwater but not reproduce, which is good for an aquarium and for the surrounding environment, as they cannot replace in any way the local population of snails if they escape. I dont know how many of them are there, hope not.. so be careful. I have a hard time believing it. Who has Nerite snails, which are 8-10 years old? However in large numbers they will require extra food. Sparkling Gouramis. It will not bother tank inhabitants. This isn’t a strict ratio, but if you add too many in a small space they won’t have enough algae to eat. The best cleanup crew in the hobby for planted tanks. If the situation is totally out of control (as if you do not see the opposite side of your tank), aquarists recommend keeping 1 Nerite snail per 1-3 gallons (~10 liters). Mystery snails will do well in almost all size tanks. These snails are well-known escape artists. 1,219 1.2K. Variety of dark bands give the zebra snail its characteristic appearance. Although the ratio doesn’t matter much in terms of fighting – the snails will rarely fight – keeping too many nerite snails in one tank may make it hard for them to find enough algae to eat. I was checking constantly this blog and I am impressed! You can feed them blanched veggies and basic algae wafers. Tip:  They are all sensitive to nitrates and need hard water. So far all I have seen are how-tos and a lot of things “hatching from nerite eggs” that definitely aren’t nerite babies…. Nice post. Thus, there is a great amount of variability between their color patterning and shell shapes. They will make your aquarium spotless in no time. Note: Unfortunately, the supplementary food is not their favorite choice and it takes time for them to get used to. Because of the challenges on feeding them, I recommend only stocking a single nerite per five gallons of tank space in a mature tank (running over six months) or one nerite per ten gallons for newer setups. So, keep it in mind. Most likely, it indicates that Nerite snail has been kept in water that is too soft and acid. This may be worth investigating further since most Nerites are collected from the wild, finding a way to breed them would be a boon to the hobby. Covering inputs with a net (or anything similar) will not prevent it. Although they have a different appearance, their care requirements are essentially the same. one site i saw said 1 snail per gallon. All nerite snails are excellent algae eaters that care mainly for algae coverings. They will not bother anybody in the aquarium. I believe that it really depends on the conditions you are keeping them, how well you feed them and the size they are when you get them. That is why, when keeping any type of these snails, it is a good idea to make sure the water line in your aquarium is not too high. Check your water parameters, record what you are doing. Do not forget to acclimate any Nerite snail (the same way as shrimp) before putting them in the tank. Here is the info from LiveAquaria: The Nerita Snails originate from the Gulf of Mexico and the Caribbean and can be found in the lower regions of rivers. They hatch as long-lived planktotrophic veligers larvae. To induce hatching of these larvae, biologists decreased salinity from 15 to 10. I highly recommend to read my article “How to Supplement Shrimp and Snails with Calcium”. Nerite Snails in 3 Gallons? If you do not want that. So limit yourself to only one nerite snail per every 5-gallon tank. They also work well in larger tanks. Once the "new" fish have grown out some (probably about 3 mo's later) I can move everyone, including the snails to the main tank. Can you put any aquarium salt in the ... Do ghost shrimp eat ordinary snails, like apple snails, mystery snails, and... Apple snails,mystery snails,nerite snails. Three types of reproductive behavior have been described in science literature: 1. Therefore, nobody knows how to do it with the naked eye. Simply add an additional five gallons for each extra snail you plan on adding to the mix. I was seeking this particular info for a very long time. To mechanically remove Nerite snail eggs, follow these steps: Find a NEW stainless steel razor blade. Third, it can take weeks before they start laying eggs and all this time you will have to keep them in 1-gallon tank(?!) 7 Turquoise Rainbows Also known as the spotted Nerite, tiger snail or zebra snail, these are foliage eaters, and are extremely hardy fish. Complex aquascapes can be dangerous for them because they can easily get stuck and lost. My fiance and that i have 3 nerites and a horned nerite in a 30 gallon tank. Note: You can use a crushed coral, and silica. Do not worry; they can live for a long period of time out of the water. Divide by 2 cc per snail gives 18,925 nerites in 10 gallons. I think that you have already guessed that I am referring to the problem of breeding Nerite snails. For example, in the study about “Freshwater neritids (Mollusca: Gastropoda) of tropical islands, amphidromy as a life cycle, a review” biologists said and I quote “After a few weeks spent at sea metamorphosed juveniles recruit at river mouths and then migrate (often over 10 km) upstream where they spend the rest of their life… Juvenile forms have been observed to move together in long lines and ⁄ or dense aggregations. Breeding these snails is a pain in the as… back. I agree. Although the worn-out appearance of these shells may be an inevitable outcome of their tendency to dissolve in calcium-poor water. Water parameters I'm not sure if I have male and female Boesemani's but I think there are 2 males and 3 females so if that is true, I will leave it at that. If you have soft water, it will be a good idea but in moderate or hard water, it is not necessary. Spirulina Powder (mixed with water) (link to see the price). It will stress snails a lot. But how? Size: 1" my 5 gallon has a nice covering of green algae coating most surfaces. Red racer nerite snail has an interesting gleaming ebony color with slight grooves on its shell, running parallel to the aperture all the way back. Therefore, if your water parameters are good enough then there is no reason to do it. you will need to add some food (veggies or alga wafers are ok). Need a bigger tank now. 1 Blue Angelfish Temperament: Peaceful The snail is reacting to the stress, which can be due to water quality issues or other irritation (somebody is bullying it). All nerite snails are detritivores and herbivores and are widely known as one of, if not the most, efficient algae eaters out of all aquarium snails. Water Conditions: 65-85° F, KH 5-12, pH 6.5-8.0 They hatch as miniature adults, a crawling snail (intracapsular metamorphosis). Of course, your aquarium would turn into a stinking mess after a few days as the snails … A question commonly... Hi everyone! Mistakenly, it is often referred to as Vittina coromandeliana, or as Neritina coromandeliana. Nerite snails absolutely do not care about a company of any other Nerite snail in the tank as well. Save my name and email in this browser for the next time I comment. Would 3 or 4 be okay? Rivers, streams, creeks, mangrove swamps, lakes, lagoons, ponds, and mouth area of rivers are all their habitats. Pros and Cons. So, you want to get a snail, but you don't want it to turn into 100 snails... Mystery snails & Cuttlebone... My snails seem to be fine with new shell gro... What is the difference between Mystery and Apple snails? Therefore, the whole process looks like this. 2. move them to a full marine setup and upto 80% will survive. After posting a reply I checked a Google source. 2 or 3? Try not to post on old posts again. How the nerite snail egg capsule hatches and how time it takes, Hi mehran, Today I would like to address this question that we see happen a lot in comments, forums, and Facebook groups. We have Neritina turrita (Chemnitz, 1786) and Neritina turrita (Gmelin, 1791). It is dead. More or less, they are the same. - they do not reproduce in freshwater. 3. You can add 1 snail per 5 gallons of water. Are there pictures of small nerite snails to prove it? Origin: Caribbean, Florida, Gulf of Mexico For example, let’s take a Tiger nerite snail. During mating, the male stays over the right side of the female, inserting his male organ below her mantle edge. They do not do quite as well in the low flow low oxygen setup. Sometimes their shells have stripes, spots, stains and the shells themselves may have kind of horns. While theoretically, 3 shrimps in a 5-gallon tank are okay (according to the rule of thumb), if I say practically, you should go for a larger tank and increase the number of shrimps to get a tank full of active shrimps. Like Amano shrimp larvae, Nerite veligers are also attracted to the light. That sounds good. Adult snails will live about 1 year under the right conditions. Color Form: Black, Brown, Green, Red . Unfortunately for some and fortunately for others, Nerite snails are extremely difficult to breed. Sometimes they can be still for hours and even days. Pieces of limestone or crushed coral are also good in a tank with Nerite snails. Note: With time, when they get old, the shells of Nerite snails, show considerable deterioration while their inhabitants are still alive and reproductively active, giving them the appearance of dead or empty shells. Nerita Snails are an efficient scavenger ideal for smaller ponds and freshwater community aquariums. Should they be drip acclimated like fish? There are scarce pieces of information that 2-3 times a day might be good enough. Note: Unfortunately, nobody has conducted any research how often Nerite snail veligers need to eat. Many shrimp breeders treat Planaria, Vorticella, Scutariella Japonica, Hydra (you can read my articles about all these parasites), and other parasites and diseases with Fenbendazole (Panacur, Canine Dewormer ), No-planaria, Benibachi – Planaria Zero. hello Michael. Nerite snails are a great addition to any planted aquarium and they will be really good friends the dwarf shrimp. The shell is dissolving. And pictures of the snails. 2. How long before nerite snails lay eggs? However, if you increase the number of snails simultaneously living in a tank, they will stop laying the eggs. The largest are zebra and tiger snails – their size is about 2.5 cm. Here comes yet another problem with Nerite snails. Unfortunately, they often fall to the ground after that and have a hard time flipping over. 2. People often confuse snail species especially when they are babies. Therefore, either these snail babies are not nerites (and you are confusing them with pond, bladder snail, etc, while they are young and tiny) or you have a slightly brackish tank and extremely lucky! Benefits of Snails for a Shrimp Aquarium. Their maximum size is about 1 inch. In general, I am not talking about Nerite snails, some, Nerite Snails – Detailed Guide: Care, Diet and Breeding. Hi I have one zebra snail and it has reproduced and at last count I have 11 baby snails.