I only have one in my Oscar tank and he pretty much keeps to himself. He has a certain cave he loves and stays there 90% of the time- at least when the light is on- I don't know what he does at night when the light is off and I'm sleeping. He is a major pig, though... he'll pop his head out whenever I put cichlid pellets or freeze-dried shrimp in the tank and gobble up as many as he thinks he can get away with. Sometimes as many as eight or nine pellets at once. But that's really the only time I ever see him. He never bothers any of the other fish at all... at least that I can see.Toddnbecka said:Asian UD cats are an altogether different critter than Synodontis species. They don't grow as large as some, but they are generally much more aggressive. Good tankmates for mid-size to large cichlids, but either keep one or a group of at least 10. They are VERY conspecific-aggressive, and unless kept in a large enough group only one will be left after a few weeks.