Taridan
Fishaholic
Has he ever been in with any other fish before? My girl thistle has wounds like that from when my other tow girls ganged up on her... after about a week of water with aquarium salt and s little bit of melafix and Pimafix she had started healing, the wounds got smaller and her scales started growing back, even though she always had an indent in her back from where the flesh had been missing. Give him time before thinking about that last alternative... also, you might want to see what temperature the water in that cup/bowl thing is.. if you have a warm room you might not have to worry, but betta's are a tropical fish and should be in water thats 74-80 Degrees farenhiet.