Their adaptations for marine life included denser bones and a hydrodynamic body structure that allowed them to swim quickly and efficiently

which suggest the presence of a kind of "hump" on its neck

Length 318mm

provided some balance and stability when moving

This suggests that it had a good sense of sight

Gryposaurus notabilis Indohyus Their adaptations for marine lifeGryposaurus notabilis was an ornithopod hadrosaurid dinosaur from the Late Cretaceous (Campanian, ~8375 million years ago) known primarily from the Dinosaur Park Formation in Alberta, Canada. It is a large hadrosaurine, closely related to Edmontosaurus, and characterized by its distinctive cranial morphology. Its most notable feature was the elongated and relatively low skull, with a gently arched dorsal profile and the presence of a prominent bony