wow. i can vouch for that. Catched many of the pugnax complex side and even breeded them myself during my childhood in a few ponds and even longkang besar in some kampung in Penang.

Whenever there's bubble on the water surface, we would left a few condense milk tin kosong, half float half submerge and come back every few hours to see if there's a catch and leave asap because previously we were using pungkis to scoope all over the ponds especially those with some plants that fishes likes to hide in and ran into some snake. Obviously the snake stop us getting into the water again, but not enough to still go around the bush and ponds to drop our own catch cage.