Hey guys! I bought a male half moon betta fish on January 24th at a local pet store, and as I have been taking care of him since then, he somehow changed colors. I'm not sure if he is marbling or sick! When I first got him, I bought a 0.6 gallon fish bowl (I'm stupid, I know). He wasn't swimming...

My newest boy. He's a cellophane double tail... but not so sure about the black ticking. Its almost in a marble-like pattern. I went to the store ORIGINALLY for some medicine (which petco apparently no longer carries antibiotics "due to the fact that they are not veterinarians") and saw him. He...