 Potential predators of the shortnose sturgeon include alligators, sharks, and other large fish such as catfish.Other known ones include sea lampreys gar, striped bass, common carp, northern pikeminnow, channel catfish, smallmouth bass, yellow perch, walleye, grey seal, fallfish, and sea lions.The life history of shortnose sturgeon beings with adults that lay their eggs in freshwater and then return to saltwater.