A nearly endless list, really... Cichla temensis, most of the Silurus sp., electric eels, asian aro, pacu (although I've done it twice before), RTC, TSN, giraffe cat, Oxydorus niger, Megalodoras uranoscopus, Pterodorus granulosus, firewood catfish, O. goramy, aba aba, Clarias sp., Channa sp, pike/muskie, Hydrolycus armatus, tarpon, Hydrocynus sp., koi, lungfish, swamp eels, african arowanas, arapaimas, etc.