Hello everyone... I am a fish caretaking novice - we have inherited the fish pictured from family who had to move overseas. To be honest, I'm not even sure it is a Betta fish, so excuse the post if it isn't...
Anyway, this morning, our fish started having these brown-ish string-y things coming out from the bottom side of the fish (near the middle of it's body). Have had the fish for a few months now, and haven't seen anything like it before, so I assume it isn't poop. Maybe it is? He/she's had about 3 of these come out this morning already, each about a 1/2 inch long. Is this a parasite of some kind?
Also a side note, but maybe related... ever since we switched to a new can of fish food (TetraMin tropical flakes), the food seems to stay floating in the tank for long periods of time. I typically scoop it out if it's been floating for more than a day. We use bottled spring water with aquarium salt and Topfin Betta water conditioner added.
Anybody know what's going on? Thank you!