Singlebarbed posted on snakeheads finding their way into English waters. I wrote this response, twice, yet somehow managed to pull off leaving a blank comment box on his site. Twice. So here’s my comment: “The critics were quite nasty about the newcomers, variously described as scaly, voracious, monstrous and homely. They stole food from natives. They had sharp teeth. They ate their young…” A description of the introduction of brown trout to U.S. waters in 1883. Also, “It has displaced resident trout from the small rivers and lakes of Montana, Colorado, New Mexico and other mountain states. The brook trout’s main victim is the cutthroat, so called for the bright slash of crimson under its jaw. Squeezed on one side by invasive brook trout, native…