nipping

I have 2 male swordtails and 1 male molly in my 20 gallon tall tank right now, and for a while they were getting along fine. The bigger swordtail (1/2 inch larger than the other) would follow around the smaller one, but nothing bad was happening. Yesterday me and my girlfriend noticed that the...

(This is a copy of a post I have in the newbie section, just wanted to make sure people see it!) I have 4 female platys, none appear to be pregnant but I have only had them one week so it is possible. The largest of the four has recently started to chase and nip all the other females in the...

I have 4 female platys in a 10 gallon tank, none appear to be pregnant but I have only had them one week so it is possible. The largest of the four has recently started to chase and nip all the other females in the tank with her. She hasn't done any real damage yet, but I don't want my other...

I bought a couple of barbs today and put them in my 24g. After an hour or so they started circling around eachother nipping at eachother's tails. Is this serious or just playing?

I just bought two new angelfish about 3 hours ago and put them in my 56 gallon tank with my older one. At first they were fine with my older one but then one of new ones started to nip at her fins. I took him out and put him in my empty 20 gallon so she wouldn't stress out. But now that I took...

I have a 10 gallon tank. It has comfortably housed a betta fish and a plecostomus (clown pleco) for about a year and they get along fine--the pleco has a lot of dark hiding places, some wood to eat, etc. and the betta stays out of his way and is disinterested. About a week ago I bought three...

I've had these two fish for about two months now. and just recently saw the dalmation molly nipping at the balloon molly (which has since been in the corner of our 10gal tank). AND the balloon molly has lost color on the top. is it stressed out? i don't know their gender but i think she's a...