What anatomical feature separates the wolf eel, Anarrhichthys ocellatus, from true marine eels like the moray?
Answer
The presence of pectoral fins located just behind the head.
The wolf eel is fundamentally classified as a long, skinny fish rather than a true eel, and a key structural feature confirming this classification is the presence of pectoral fins situated immediately behind the head. True marine eels, such as morays, lack these fins. This characteristic places the wolf eel firmly within the general structure of a fish, despite its elongated morphology. Furthermore, the text notes it belongs to the family Anarhichadidae, the wolffishes, reinforcing its distinction from true eels based on skeletal and fin structure.

Related Questions
What anatomical feature separates the wolf eel, Anarrhichthys ocellatus, from true marine eels like the moray?What coloration defines the appearance of newly hatched larvae and juveniles of the wolf eel?What feature on adult wolf eels develops a pattern unique to each individual, similar to a fingerprint?What anatomical features related to movement and lateral sensing does the adult wolf eel structurally lack?Where do adult wolf eels, creatures of the benthos, primarily establish their preferred residences?What specialized dental structure located in the rear section of the wolf eel's mouth is used for crushing favored prey items?For how many weeks do both parents fiercely guard the substantial egg mass of the wolf eel before hatching occurs?What specific large marine mammal has been documented preying on fully grown adult wolf eels?What specific title, signifying deep cultural respect, was the wolf eel given by indigenous peoples of the Northwest coast?What crucial instruction must aquarists follow regarding soft meals like squid if they are feeding adult wolf eels?