My betta, Mr. Fish has been exhibiting some weird behaviors now that I got him a new, submersible thermometer.
Whenever it's in the main chamber of his tank, he only ever swims by it, flaring occasionally at the black suction cup piece and the rest of the time swimming around it.
If I move it to where he cant see it, he freaks out, his fins clamp and he looks stressed beyond belief
I'm completely baffled about why he's doing this. Shouldnt he be relieved if the supposed threat of the "evil suction cup" is removed?