Well...that's not entirely true. But, it would seem to be possible. My cray doesn't care what's in the tank with her. She's got 5 guppies, 3 tiger barbs, and 1 Phantom Tetra in the tank and she hasn't touched them. In fact....I bought her because they said she would eat everything and anything. At the time, I had the Tetra and decided that he wouldn't die. He's still alive after 5 months in the same tank with her.Gunnie said:Yes. Any of those lobsters or crayfish will eat anything they can catch. They are not the fastest creatures in the world, but if a fish makes a mistake and gets too close, they will eat them.