Family Ichthyosauridae belongs to the order Ichthyosauria, and they are a group of extinct marine reptiles that lived during the Mesozoic Era. The word "family" implies that these ichthyosaurs share common characteristics, anatomy, and evolutionary history. Synonyms for Ichthyosauridae include "fish lizard family," "ichthyosaur family," and "marine reptile family." These terms are used interchangeably to refer to the same group of species. Other related words that may be used to describe these creatures include "prehistoric sea dragons" and "fossilized aquatic dinosaurs." Scientists continue to study and classify these fascinating animals, shedding light on their life cycle, behavior, and adaptations to life in the ocean.