grenadier, also called rat-tail or rattail, any of about 300 species of abundant deep-sea fishes of the family Macrouridae found along the ocean bottom in warm and temperate regions.

What do rat tail eels eat?

Keen eyesight reveals prey, like fishes and squid, darting in the waters above the seafloor. A rattail relies on other senses, like smell and touch, to find a meal too. It has a nose for rotting carrion, and sensitive barbels on its chin detect small crustaceans or worms wiggling in the mud below.

Why are grenadier fish called that?

Fisheries began developing for these fish in the late 1970's through to today. Nobody wants to eat a rattail. So they are now commonly called grenadiers. That sounds much more exotic and appetizing than rattail.