Order Apodes, which consists of eel-like fish without pelvic fins, is known by several synonyms to cover the range of these marine creatures. One such synonym is Anguilliformes, which means "eel-like." Other synonyms are Apodiformes, Congridae, and Ophichthidae, which all refer to specific eel families. Moreover, the term 'snake-like fish' is a more general synonym for the order. However, despite having different names, all these synonyms describe the same eel-like fish species. The various synonyms provide scientists and researchers with essential vocabulary to discuss and study these fascinating creatures in different contexts and across different ecosystems.