Fern came home in July, same time as i brought another girl home who's already passed.
She was fine her first few months here, then in September i noticed she started getting a little lump on her right side. Not huge, and even after quarantining in aq salt, it didn't go away. But she swam normally, was (IS STILL) active and nuts like all my other ladies, eats lots, nibbles on my fingers, and was a seemingly happy girl.
At first it was just her right side growing, so I was thinking tumor. Now she's pretty evenly round, and seems to still be getting bigger. What could this be?
Her tank mates when i noticed the little lump were just four other betta females. One of those passed away, and then there were only 3 other females for several weeks. Recently i put a couple of danios and a couple of swordtails into the tank as a temporary escape from some mating angelfish. I plan on rehoming those four fish, probably at a pet store, very soon.
I have lost two other betta females in that tank, from seemingly different causes. One died out of nowhere, seemed fine the day before and the next day just died, and the other one died from some very obvious dropsy. No other fish in the tank has shown signs of any illness or even stress.