Hello all, I have a 4 week old 55 Gallon aquarium. I did my best to do everything right and read all the books so I wouldnt kill anything. Well 4 weeks and counting and I have 8 Damsels and 2 Clown fish and they all look extra healthy and active and they are all eating well. Here's my ??, I have noticed as time is going on that the fish (pretty much all of them) seem to swim around all day and are pretty active. But as soon as a fish gets near another they seem to go after each other a little. There is plenty of hiding places ( I have rock and coral and gullies all built along the back for everyone to hide) None of the fish have fin damage or anything, as a matter of fact I've never seen one actually get nipped, just chased for very short spurts. It's not just the Damsels either, the clown fish seem to go at each other a little and obviously certain damsels are worse than others..ie: 3 striped, domino are probably the worse. I've also seen them kinda flutter their rear fins at each other. Almost looks like they could be playing we each other. The 2 Clowns do this as well as the 3 striped and domino to all the fish. Any help or explanation would be great.