Hey my young Calvus Cichlid has a habit of bobbing his rear up and down slowly while his head and body remains stationary. I dont think this is a problem with gas from food, since the entire fish would be floating up and trying to swim down; this is not the case. When the Calvus swims, it is clean and quick only to stop on certain moments and start bobbing again. I am a little new to this behavior and was wondernig if maybe the Calvus is trying to get my attention or something? 
Answers appreciated, thank you!
Answers appreciated, thank you!