New here and to the hobby. Just got one Otto Cat two days ago. I noticed he has two bubbles like thing in his head that's on both sides. Is this normal or something to worry about? Looked at a ton of Otto pictures, didn't see anything like it. Searched and searched didn't see a question about this being asked. I was rushed by the guy at LFS, forgot it's a social fish and should have gotten at least one more and after the tank had been completely cycled, wanted to return him but the store is closed for two days. Acclimated Otto to the new tank over night. He's doing fine. He always seem to have a full belly. Left a piece of blanched cucumber in just in case but uneaten. Otto's active, not afraid of Betta and Betta doesn't bother him either. Not sure what kind of Otto Cat he/she is. If someone can help ID, will be great.