Fossil Facts > Ichthyosaur & Plesiosaur

Did you know that ichthyosaurs & plesiosaurs have differently shaped vertebrae because they swam in different ways? They’re different because ichthyosaurs swam by moving their tails from side to side. Plesiosaurs used flippers to swim, so did not need vertebrae the same shape.

Tags: ichthyosaur | plesiosaur