I have 4 Motoros and they have been doing very well. One of the males occasionally curls up his disk in the front and back like he has a belly ache or major constipation. He is the only one who acts stange and it has happened three times about a month apart. Each time I think I am going to lose him but after 24 hours or so he is back to normal and eating. He is the biggest eater of the group. This time it happened the morning after he ate talapia, shrimp and earthworms the night before. If anyone has seen this behavior and knows what it is please let me know. It is hard to watch because I feel so helpless. Next time I'll post pictures but this time I covered the tank and tried to keep them stress free so I couldn't get pictures. I asppreciate any help with this issue.