One suspect in the Navesink Sea Serpent case is the Sturgeon. New Jersey has two species, the Atlantic Sturgeon and the Short Nose Sturgeon. Both have been known to wash up on Jersey beaches like the one in the photo. I will be interviewing someone this weekend that claims to have seen a large sturgeon in the Navesink a couple weeks ago. The witness is a well known journalist, and I am excited to hear his story. The sturgeon is a possible explanation for at least some of the Navesink Serpent sightings.
Biological Mysteries of the Jersey Shore 