Like I said before, they are semi predators. Some fish like pike are complete predators that feed only on fish, frogs etc. Ide eats small minnows but it loves other food too - different bugs, snails, worms, grasshoppers and similar creatures.

It's mouth isn't designed for predatory behavior and that means it can't eat large fish.

EDIT:

By the way, you can look at it in this video:

http://www.nomad.lv/?p=3468 [at 23:30]

Last edited by Grundulis; 05/16/12 12:52 PM.