1.   Most snakes swallow their prey whole.

2.   As a frog swallows its prey, the eyes sink through openings in the skull and help force the food down the throat.

3.   Rather than extracting nutritious shellfish from their hard shells, ichthyosaurs swallowed their prey whole and digested the soft tissue in their gut.

4.   The teeth of the bluefish are so sharp that instead of capturing and swallowing its prey, it often tears off and swallows chunks of it.