I'm sure we have all had fish that are certifiably bonkers. For me, my school of yoyo loaches. Completely psychotic fish. Who ever said these fish are bottom dwellers have not met these guys. Up and down, up and down, left, right, all over sniffing out every surface at ever angle nonstop. Darting in and out of the java moss like a jungle gym. Zooming across the glass anytime someone approaches. I can't even describe the acrobatic frenzy they get into once they smell food. Pot bellied buggers, they are nuts. I think the funniest aspect about them, is that they have no concept of personal space. Zero. They crawl all over every fish sniffing them out. They were even all over my angel fish pair as they were breeding. These loaches simply don't care. Hysterical fish they are.