So, just now I noticed when I got home from work that most of my harlequin rasboras are pretty fat... I didnt notice this before... I also noticed that my rainbow shark is kind of fat too... Recently all four of my tiger barbs and one oto cat died... I honestly do not know why. I have 6 rasboras, 1 juvenile rainbow shark, and one oto cat. I feed them tetra min tropical flakes, peas, wardley algae discs, and once about a week ago, freeze dried blood worms... My rasboras flare their fins and do a dance, but I always thought it was for dominance. They could also be constipated... But I only fed them a few tropical flakes this morning and they don't seem to be swimming too oddly. But my rainbow shark has been swimming around and then pausing a little, and then swimming again. I do have a anubias plant as well. Please tell me if its worms or something else!