Assassin Snail  (Anentome helena)

Assassin Snails are known to be extremely active,
Assassins  will eat on average 1 snail a day, half of their size

They need protein in their diet, if they eat all of your unwanted snails you will need to feed them a meaty diet like frozen bloodworms. If fed well they can lay from 2 to 15 eggs at a time that will taker about a month to hatch.

If you have dead shrimp or one that is dyeing you will probably see the snail feeding on them, this is just a naturall process.