In article ,
Philippe Lemaire \(remove oldies\) wrote:
Richard Sexton wrote:
Not primarily. You can tell what a fish eats from the shape of its mouth.

It mostly eats insects, crustaceans and worms in the wild.

He nibbles under leaves and wood, but what then ?

It's eating the micro organisms that live there. Just because you
can't see them them doesn't mean he can't

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