One of the bettas in my sorority has been behaving oddly the last couple days. I noticed it the night before, because it was taking her an exceptionally long time to notice that it was "feeding time," when she's usually one of the first to arrive.
Additionally, she wasn't finding the pellets--another odd sign, she's usually the one to find the most of them. I'd even drop food right in front of her nose, and her eyes, and she would still not notice them.
This repeated for a second day, so last night I temporarily put her in her betta cup until she ate her pellets. It took over 20 minutes, knowing she hadn't eaten the day before, before she finally "found" all the pellets. They had sunk to the bottom of the cup, and she'd only find them after bumping them with her mouth. And even then she sometimes missed. I adjusted the lighting periodically throughout her "feeding" to see if that helped her any, but noticed no difference in response.
This morning I've been watching her "nosing" her way through the sorority tank, mostly at the top, as if she is "feeling" her way around. She's particularly "bumpy" to the sides of the tank and the large ornamental tree root in the center of the tank--fixtures that have been constant in the two months I have now owned her.
I tried shining some lights in her eyes, and the light reflected back did seem rather cloudy, so maybe she developed some cataracts. Her eyes have always been a dark black, which makes it hard to see inside them. She still seems to be moving her eyes, but I'm really starting to suspect that she can't see anything at all.
Again, this behavior has only been obviously occurring for the last two days. She's always had two odd-colored "bumps" at the top of her head, if that sounds like the possibility of a tumor. If necessary, I can try to photograph this section later in the day, as the lighting gets a bit better.