hey dorri provide us with some info so we can help you out. That is not normal behavior. Betta's are normally active, responsive, and inquisitive fish.
Hanging out at the bottom of the tank is a good sign that something could be wrong. This could range from low temperature, bad water conditions, internal infections, or a myriad of things.
How long have you had Casey?
What size tank is he in? (heated, filtered?) ---> if filtered, is there a high filter flow?
When did you last change the water?
Any signs of external infections? (fin rot, etc)
I'm guessing that he is not in a filtered or heated tank. ... but let us know ASAP so we can help you. If there is something that is really wrong, the faster you act, the better.
