I thought I would start a thread about what weird behaviors your fish have.
My new (I've had him less than a month) betta Vega has two funny habits. The first is that likes to sit on the top most leaf of his silk plant like he is going to rest, then he scoots himself off the leaf slowly and free falls to the bottom of the tank. He then loops around the bottom of the tank and repeats. It's the strangest thing I think I have seen a betta do but he seems to enjoy it.
The other habit he has is he likes to swim in the current made by the filter. He also likes to bite at the water coming into the tank off the lip of the filter. I've heard other users on here say their betta's like to swim in the filter currents too.
I just thought I would share and wondered if other users have observed their fish doing strange things.