The encounter I've been discussing with a friend happens to be a Deinosuchus (terrible crocodile) from the Cretaceous. Don't worry, they are on a planet inhabited by humanoid sapient dinosaurs of the Utahraptor variety. Anyhow, it's different from the man meets orcress, and then man gets beat up by 4 orcs in speedos.
A Deinosuchus is a fresh water fifty foot long alligator with the temperament of a nile crocodile. And I'm terrorizing a beach with it, oh joy.