It looks like an eel,(which is a living fossil), but it isn’t. The blue dragon fish is small, weighing circa 2–50 cm (0.8 –20 inches).
They don’t like the surf; they usually are found at a dept of 1,500 metres in the Pacific, Atlantic, and Indian oceans. they visualise their prey with the help of glowing barbels.
A Barbel ”is a slender, whiskerlike sensory organ near the mouth.” It known to migrate vertically whilst capturing its prey.