The big fin is a strange species of blue catfish that I’ve only seen in this navigation channel. The locals call them “white cats”, as they have a tenancy to be nearly pure white instead of greyish blue. They have the same pristine pure white meat as normal blues. story goes they were stocked in the early 70′s when the river was turned into a nav channel. originality it was designed as a state park but all but one have been abandoned. lots of ghost town state parks along the river with boat only access. can be very creepy at night in some areas. My biggest from that river was 43lbs last summer.