Ok i have a blind cave tetra... guy is funny to watch, he swims normal most of the time, but then all of a sudden like he has tarets syndrome or something , he starts swimming like a twister, or in loops constantly going in twister motion, he does this for a good thirty minutes, then he goes and lays on the bottom of the tank catching his breath because he is tired... i think he is sick but the minute i come over to tank he starts swimming normally. He has done this for over a month, don't think he is ill just a wierd fish i think. Anyone have something similary with tetras or other fish?