My betta fish, Odahviing, passed away last night.
He was overcome with this black thing that spread to the rest of his body. I had no idea what it was and could only watch him struggle for air. Last night I had put him in the cup he came in so that he could reach the surface easier. This morning I found him dead.
I only had him for two days. I donít know if he was already sick when I bought him or it was something in my tank. Or even worse, if it was something I could've cured.
Iím just going to clean out the tank today and mourn his passing.