Why is Anarrhichthys ocellatus not classified as a true eel?

It possesses distinct paired pectoral fins situated behind its head.

The classification of the Wolf Eel as a fish, rather than a true eel, is confirmed by fundamental anatomical differences in fin structure. True eels, such as morays, lack paired fins entirely or possess only vestigial structures in those areas. A defining characteristic of the Wolf Eel, which firmly places it within the fish category, is the presence of distinct, paired pectoral fins located just behind the head. These fins are crucial for stability and steering, especially when maneuvering into tight spaces. Conversely, true eels exhibit a smooth, ribbon-like edge created by the fusion of the dorsal, caudal, and anal fins running continuously along the body, a feature the Wolf Eel lacks.