Will Rabbit Snails Eat My Shrimp? What Actually Happens in a Shared Tank

You’d like a rabbit snail in your shrimp tank, but somewhere you read that they eat shrimp. They don’t: rabbit snails (Tylomelania sp.) are slow grazers that scrape a film of algae and microbes off rock, wood and glass, and we couldn’t find a single published record of one catching a live shrimp or shrimplet. If you’ve found a snail on a shrimp, the shrimp had most likely died first. What decides whether your shrimp and a rabbit snail belong together is the water, not the snail’s appetite.

Why rabbit snails don’t hunt shrimp or shrimplets

A rabbit snail eats by grazing, and grazing is all it’s built for. Species that live on hard surfaces spend their time on stones and glass and feed on the biofilm growing there, according to the conservation group Sulawesi Keepers.¹ The tool for the job is the radula, a ribbon of tiny teeth the snail draws across a surface. In one Lake Towuti species, snails living on rock and snails living on submerged wood carry measurably different radulae, and the researchers call it the snail’s key foraging organ.² Everything documented about how these snails feed is about working a surface. What else goes on that menu is covered in what rabbit snails eat.

Then there’s speed. A rabbit snail moves slowly, and a healthy shrimp that bumps into one just moves off. It’s hard to ambush anything at that pace. Shrimplets are what most keepers actually worry about, since they’re tiny and spend the day picking at the same film the snail grazes. We haven’t found a report of a rabbit snail taking a live one. If you’re watching a berried female or a tank full of babies, the snail isn’t where we’d look for trouble. Nor does it bully fish: rabbit snails aren’t aggressive toward anything in the tank.

So are rabbit snails strict vegetarians? Not all of them. Sulawesi Keepers describes the generalist species as omnivorous and voracious.¹ That wider appetite is the likeliest reason keepers find them on shrimp that have already died.

Found a rabbit snail on a dead shrimp?

Then the shrimp most likely died before the snail got there. It’s a sight that sends plenty of keepers to a forum convinced they’ve bought a predator, but keepers commonly report that when they look closely, the snail is feeding on a shrimp that was already dead. That fits everything known about how these snails feed. The snail found the body. It didn’t cause the death. Rabbit snails treat a dead snail the same way, which is whether rabbit snails eat other snails.

Read it as a message about the tank instead. Lift the body out as soon as you see it, because a dead shrimp breaks down quickly in warm water. In fresh water, the share of ammonia in its most toxic form rises about tenfold for each full step up in pH and roughly doubles for every ten degrees Celsius of warming.³ A warm, alkaline tank like this one gives you less margin when something rots. Then work through the likely causes:

• Ammonia and nitrite, which should both read zero in a cycled tank.
• Temperature, pH, GH and KH against the range in the table below, and whether any of them has swung recently.
• Anything new in the last few days: a tankmate, a water change you didn’t match, a plant, a decoration or a treatment.
• Any medication or plant product that might contain copper, which shrimp and snails shouldn’t be exposed to.

If shrimp keep dying while every reading looks right, don’t guess at a treatment. Ask a local specialist or an aquatic vet who can look at the tank.

Which shrimp can live with rabbit snails?

Only shrimp that want the same water. Rabbit snails need a warm, alkaline, mineral-rich Sulawesi setup. No published source gives them a keeping range of their own, so the range below is the Sulawesi shrimp range, copied number for number. The full pairing with Sulawesi shrimp, stocking included, is Sulawesi shrimp living with rabbit snails.

Cherry shrimp are a different case. Neocaridina are usually kept at 65-78°F (18-26°C), but in a 90-day study they grew, matured and bred at 82°F (28°C), so the bottom of a rabbit snail tank’s range suits them.⁴ Plenty of care sheets list them as tankmates without mentioning that this is warmer than they’re usually kept. One keeper has kept rabbit snails for about two years in a 12.5 gallon planted tank with cherry shrimp. In some of our own Sulawesi tanks, a small group of Neocaridina lives and breeds at the snail’s temperature, up to 86°F (30°C). Above that the risk climbs fast, and breeding fails at 90°F (32°C).⁴ Keep the tank in the snail’s range, keep the group small, and move any shrimp that hide all day or keep dying to cooler water. That’s the approach for rabbit snails with Neocaridina shrimp, and the part above 82°F is our experience, not a published finding.

How to keep rabbit snails and Sulawesi shrimp from competing for food

Plan for grazing room. With Sulawesi shrimp, both animals work the same film on rock and glass, and a snail this size takes a real share of it. We know you want to add the snail on the same day as the shrimp and call the tank finished. Give the surfaces time first, because a bare rock feeds nobody. The same arithmetic decides rabbit snail tank size.

• Wait until rock and glass carry a visible film of algae and biofilm before the snail goes in.
• Count the snail as part of the grazing load when you decide how many shrimp the tank can carry.
• Don’t lean on prepared food to make up for a young tank. It won’t stand in for a mature film.

Before you add a rabbit snail to your shrimp tank

Make sure the tank is ready, because the tank is the hard part. As animals go, rabbit snails are a moderate keep, hardier than the Sulawesi shrimp they share water with. The water has to be mature, warm, alkaline and mineral-rich before either animal goes in, so a rabbit snail isn’t an easier way into Sulawesi keeping or a good first animal for a new tank. The tank itself is set out in Sulawesi rabbit snail care.

If your setup already fits, our Sulawesi snail lines are tank-bred by Shrimp Aquatics, not collected from the wild. We don’t promise breeding, sex or the number of young from any order. Not sure your water fits? Email contact@shrimpaquatics.com with your pH, GH, KH, TDS, temperature, tank size, cycle status and current livestock, and we’ll tell you whether it fits.

References

4 Sources

1. Do you know Sulawesi snails?, Markéta Rejlková, Sulawesi Keepers, undated page, accessed 2026-09-24.
2. Evolutionary Divergence and Radula Diversification in Two Ecomorphs from an Adaptive Radiation of Freshwater Snails, Hilgers L. et al., Genes 13(6): 1029, 2022.
3. Aquatic Life Ambient Water Quality Criteria for Ammonia, Freshwater (2013), U.S. Environmental Protection Agency, Office of Water, April 2013.
4. Tropea, Stumpf and Lopez Greco, Effect of Temperature on Biochemical Composition, Growth and Reproduction of the Ornamental Red Cherry Shrimp Neocaridina heteropoda heteropoda (Decapoda, Caridea), PLOS ONE 10(3): e0119468, 2015.