Right before my betta died, he went from being extremely lethargic for days, to swimming the craziest way I have ever seen, and I know what Swim Bladder Disorder looks like .. this was fast, all of a sudden, upside down and swirling and spinning. Then he stopped and died about a half hour later.
I googled the symptoms to death and I found "Whirling Disease" which sounds horribly contagious to other fish .. .
or could it have been something else related to a betta's final moments? He was originally in a hospital tank because of lethargy, spitting out food, and upon very close inspection I believe he could have been pineconing and swollen, but very very slightly. In other words, I thought I could save him since it looked like very early stage.
Anyway, just curious, anyone ever have a fish swirl and spin crazily right before death?