[leebca]

The Chocolate Chip Starfish is a very robust carnivore. It is also very aggressive, which is probably one reason it does so well in the aquarium.

It doesn't 'eat snails' per se, but it won't refuse one if the Star is hungry. Basically the Starfish will eat whatever it can grab. Keeping one of these presents a problem regarding a cleanup crew.

In general, shrimp can escape from the Starfish. Some crabs can be caught by the Starfish (and I wouldn't recommend hermit crabs anyway). If you're planning a tank of 180 gallons or more, an appropriate cucumber would do well with the Starfish.

Sand sifting fishes and fishes that are detritivores should be able to get out of the Star's way, too.

You can keep snails, but you'll need to prefer the large ones and to keep the Starfish well fed.