: The family Anguillidae includes catadromous species that live in freshwater but migrate to the ocean to spawn. Major Groups : Well-known families include: Muraenidae : Moray eels. Congridae : Conger and garden eels. Anguillidae : Freshwater eels. Ophichthidae : Snake and worm eels. Life Cycle
While many other fish—such as electric eels and swamp eels—have evolved similar elongated shapes, they belong to different taxonomic orders and are not "true" eels. anguilliformes
The oldest fossil record of a living true eel lineage ... - bioRxiv : The family Anguillidae includes catadromous species that
: Most species have a snakelike appearance with a complete absence of pelvic fins . Their dorsal, anal, and caudal fins are often continuous, forming a single fringe around the tail. and caudal fins are often continuous