I totally forgot to ask when I first joined. One time I was fishing for salmon on the Feather river in Oroville California(near Sacramento) and we were using lures. My friend was a ways down river and yells out he snagged a fish. He held it up and it looked like a 2 foot pleco. It was yellow-brownish and had the sucker mouth. Are these native or was it introduced? He threw it back before I could really take a look.