The Family Chelonidae is a group of sea turtles that includes five separate species. These animals are characterized by their flattened shells, streamlined bodies, and large flippers that allow them to travel great distances through the oceans. While the word "Family Chelonidae" is the scientific name for this group, there are several synonyms that can be used to refer to these creatures. Some alternatives include sea turtles, marine turtles, and chelonians. Each of these terms is widely recognized and can be used interchangeably when discussing this fascinating group of animals.