Ichthyosauridae

Example:Early ancestors of ichthyosaurs likely had a more terrestrial lifestyle before evolving for aquatic life.

Definition:Relating to the land or living on the land, as opposed to marine life which inhabits water.

Example:Unlike ichthyosaurs, crocodiles were marine animals, thriving in freshwater and coastal environments.

Definition:Relating to the sea or oceans, as opposed to freshwater or land environments.