Snow Pleco's are native to South America but have made their way into the USA by people releasing them into the wild after keeping them as pets in aquariums.
This picture is of one of those fish. This one was captured in retention pond in SW Florida. Snow Pleco's reach lengths of 2 feet commonly even in aquariums. The myth about the size of the tank limiting the size of the fish is false and contributes to the illegal introduction of exotic fish into US waters.