Giant Carp (aka Giant Barb)
Drew up a monster river fish from Southeast Asia I have wanted to do for a while: the Giant Carp also known as the Giant Barb. (scientifically (Catlocarpio siamensis) ). It is a endangered fish that gets to over 600lbs (300kg) and like grass carp lacks barbs, though has the typical coarse scales of most minnows (i.e. barbs and carps).  A full grown fish from Thailand or Cambodia would be as big as a motorcycle or subcompact car.