fish behavior

Hello, tried searching for discussion about this but was unable to find much. I recently introduced a blue green chromis into my biocube 29. I have a firefish, perc and ocellaris as well in the tank. Everything was great for the first few weeks, but the past 2-3 weeks our chromis has been...

I have a 60 gallon aquarium with a corner overflow that falls into a 55 gallon sump. It goes through a felt filter sock and I have a protein skimmer in the large chamber. I have about 75 lbs of live rock in the display tank with a less than one inch deep sand bed.i have two suspended...

I have a couple of fish that seem to want to be cleaned by my cleaner shrimp, show up where the two of them hang out and flash for them. the cleaner shrimp don't care to clean them or anything. this has been going on for a few months, and I haven't found ich, or disease on the fish, I think it's...

My damsel is doing a strange behavior I've never seen before. It's rubbing its belly along the corner of my tank, away from all the other fish. Usually he's in the thick of it with the clowns. But today all he seems to be interested in is going up and down the corner, and barely showed any...