Anyone had them in there aquarium? I got lucky on mine. I was just coming back from a trip to Oklahoma. With a baby Panther Grouper and a fancy damsel( Okay so there is no such thing but I could never figure out what it was, the lady was just tryin to get rid of it.) I come home and throw them into my newly established 55. Then the next couple of days I start to see more and more of these little bastards. I start to think there parasites, and I fear for my grouper. SO I went out and bought about $300 worth of aquarium books, and find out nothing. So I found a crap load of them living on top of the carbon chamber in my magnum 350 canister, so I scooped them up into a bag and went to the nearest fish retailer. The guy told me they were Copepods and that they were harmless, Infact they help keep algea growth in check, and they are the main food supplie of some kinds of gobies. 
That was a big kick in the nuts for me. 6 months later the Panther Grouper is about 6 inches long and devours the damsel. So moral of that story don't keep Panther Groupers with damsels. Does any bod else have em? Please tell.
That was a big kick in the nuts for me. 6 months later the Panther Grouper is about 6 inches long and devours the damsel. So moral of that story don't keep Panther Groupers with damsels. Does any bod else have em? Please tell.
i also found another interesting fellow called a amphipod, they look kinda like a clawless lobster/flea-thing...or something. i know my mandarin dragonet tears them a new a-hole if they dare come into open water though. 