This is long-jawed mudsucker (Gillichthys mirabilis). This little guy was caught in the crab trap set to catch crabs. It is baited with dry dog food which sometimes entices intrepid mice. ~ The mice have to dodge birds, rattle snakes, in-coming tides, lots of mud, and large distances from dry land where they make their homes.
We catch, measure, and release animals. This mudsucker got to have its picture taken.