Wherever catfish lurk, there are monsters among them. Species of these fish can grow to mammoth sizes anywhere, but none compare to the Mekong giant catfish of Southeast Asia.
Capable of growing to over 10 feet long, this is one fish you probably wouldn't want to feel slither past your leg while taking an afternoon dip. Unfortunately, their large size also makes them a prize catch, and these giant catfish have nearly been fished to extinction.
Though they are now protected from fisherman, they are likely to remain critically endangered due to the construction of upstream dams on the Mekong.