I scuba dive in the great lakes where there are thousands upon thousands of them. My brother brought me home one that he caught and i wouldent let him put it in one of my tanks so i kept it in a betta container where it died
Divers and fishermen are told to cut them in half around here because they are a plague upon our lakes. Lost of divers i know go down there with knives and find their nests. Kindof barbaric, but they have really hurt the fishing industries and nuture of the lakes.
They shouldent be sold in pet stores... because we know what happens id a few get loose.