
Urosphen is an extinct genus of prehistoric bony fish that lived from the early to middle Eocene.
Urosphen was slow like Nardoechelys. Despite its slow movement, it had different ways to attack other fishes.
If it weren't for the extinction of the other prehistoric Anguillidae, you might think that Urosphen would hunt other extant fish. It has a relative from Brazil and Asia called Urosphenopsis.