Originally Posted by Oldfishlady
Are you sure you are not seeing the caudal peduncle a normal part of the anatomy...some can protrude more on some Bettas than others....
Post a pic...both a side view and from above....
I will try....he's not very photogenic anymore... had bad case of fin rot last year....he still eats like a little piggy and loves attention.I have even recently bought stress coat to see if it will help his fins...trying my best to take care of my boys. Have a water test kit at the post office, but due to work schedule and post office hours, I won't be able to get it from there until Tuesday.
The "tumor" showed up a couple months ago and has been something that I keep checking on.