behavior

Hi guys- I bought a small pleco a while back-around 2 1/2 inches long-and he enjoys staying in the one cave (so far) in my tank. However, that's all he does during the day. He NEVER comes out. The only time he came out was the day I put him in my tank; he also only comes out at night. Is this...

60gal 9 small/medium sunfish variety Fish all normally swim around and interact with us and thus far display normal behavior. Just yesterday they appear to have been spooked by an unknown cause erratically swimming around the bottom of the tank kicking up rock substrate almost in a frenzy...

I've noticed one of my keyholes will turn on its side and start nudging toward a select few of the other keyholes in the tank when they get near it. Does anyone know if this is a territorial behavior or a breeding behavior?

Hello MFK! First of all, please don't turn this into a "why did you bought an arapaima in the first place?" kinda thread. This is my first arapaima but not my first monster fish, I've kept south-american and jardini arowanas before as well as some big catfish, so I have a slight idea of what...

Just wanted to share some cool behavior my curu has been doing the last couple days, and wonder if anyone else ever noticed something similar. So my ornate bichir hides a lot, if you look at my old thread the two were practically inseparable and were always together, now whenever my bichir is...