angels in general, along with other species of fish have a redisposition for nipping at clams, polyps, and sessiles. when this happens, the coral or clam releases its zoo due to the stressed incurred, and this exasperates the tendancy to nip at the subject because the fish acquires a taste for the zoo, and also for the coral or clam. they are merely responding to the clams reaction of expelling its zoo. once this happens the fish will tear into everything that it can on a craze for the photosynthetic bacteria.
DONT DO IT!!!!!!!!! please!