fish agression

I have two tanks the same size. I have a trio of guppies in each tank. One male and two females, with a small number of fry. The biggest female is chasing the other two fish relentlessly, and nipping fins of the male who can’t swim as fast. She never seems to stop. I have a small, cycled, bare...

Hey everyone how are you all? Anyways I know quite a few people who have fish that are aggressive towards each other or just simply mixed the wrong fish and then theres me who decided to mix central and south american cichlids (turned out to be a success however in alot of cases it wouldnt have)...

I've had my angelfish for about seven months. They've been together in a 36 gallon, 2-foot high aquarium. Up until this point, they've been living peacefully, only chasing each other around now and again. Other than that, they seemed okay with each other, swimming closely without getting nosey...

I've been doing my research for a 75 liter tank for a betta and some shrimp. I have experience in keeping pond fish however completely new to a planted tank. My main concern is making sure everyone in the tank has enough space and hiding places . I ideally would like to have a betta, shrimp, a...

I brought two fish from my local pet store one is a male jaguar cichlid but the female looks like a dovii, the female is very agrressive towards the jaguar male. She is only about 6" right now, if she is a dovii i will have to return her.