[Coral-List] Diet for some coral fishes

[James]

Hi there

I am doing this experiment in some glass aquarium tanks , basically 
looking at fish species that do contribute (eat corals)to sediments. just 
wondering if somebody have some idea on which speceis of coral  this 
species of fish graze on:Chaetodon melanotus,Chaetodon Unimaculatus
Chaetodon punctatofasciatus,Scarus bleekeri, Scarus flavipectoralis
Scarus chameleon,Cheilinus undulatus,Arothron hispidus
Canthigaster solandri

Cheers
James