The assassin snail (Clea helena) is a freshwater snail belonging to the Buccinidae family. The Buccinidae family contains the “true whelks”; a carnivorous group of snails.Their name comes from their carnivorous diet choices. They enjoy eating other small snails. They’re native to Southeast Asia, living in lakes and rivers throughout countries like Malaysia, Thailand and Indonesia. These snails are bred here at our facilities. They are easy to care for. They are mostly known to be nocturnal and hunt at night, but they will break this habit if they sense that you’re feeding them in the daytime. They’ll emerge and head straight to the food. This snail will not eat up algae, they are strictly carnivorous. They will remove all other small snail species. Assassins will eat small snails with little thought.
A lot of their time will be spent buried in the substrate. They wait here for anything that moves above them (like smaller snails). They’re not an aggressive species and won’t bother your fish, but any slow-moving animals that are small enough to be eaten might be seen as prey. Assassin snails will also feed on any food high in protein, such as frozen food, pellets and flake food.
It is a small snail, a healthy adult will reach around 1 inch, but they can grow larger depending on their diet. Wild assassin snails tend to be a little bigger than those bred in captivity. They prefer sandy bottom, it is easier for them to forage and move on the sand, small gravel will work too.
They are ideal for planted tanks or paludariums. If you keep lots of plants and want some snails, most species would start to eat the plants and cause damage. Assassin snails will leave them alone, so your plants can flourish. The temperature should be between 70-80°F and pH in the range of 7-8. The water should be kept slightly on the hard side for healthy shell growth. Assassin snails will do well in a 5 gallon tank; but bigger is better.
Your snails will pay little attention to any fish you add, the problem is that there are a lot of fish such as cichlids and catfish that will eat snails. They will be fine with most common community fish. Small species that swim in the mid-levels of the tank such as: Guppies/endlers, Rice fish, Cardinal tetras, and danios will make good tank mates. Others include peaceful gourami, rainbowfish, angelfish and shrimp.