I just tried clams in the shell. Snails and shrimp loved it. Fish wouldn't touch it. I'm going to try cutting them up next.I was weary of getting a blue streaked cleaner wrasse and started a thread also about 5- 6 months ago,but got one and doing well,cleans a few fish ( coral beauty,copperband,silver belly wrasse ywg,and 1 blenny,other fish won't let him " clean" he also eats the small bits of clams I cut slivers/ diced which floats in the water and he gets lots the little bits what other fish seem to leave but started feeding clams/ oysters/ scallops because got copperband but it's one of main feed that feed 2- 3 times daily and all fish and cuc love it