snake mackerel
Gempylus serpens

Later, it was described as being a basal snake mackerel.

The black snake mackerel, Nealotus tripes, is a species of mackerel-like fish in the family Gempylidae.

The Gempylidae are a family of perciform fishes, commonly known as snake mackerels or escolars.

The domine is a tropical fish in the family Gempylidae (snake mackerels).

Escolar, Lepidocybium flavobrunneum - which is a snake mackerel, not a tuna.

The snake mackerel has a very long, slender, laterally compressed body.

Adult snake mackerels conduct a diel vertical migration, staying in deeper water during the day and rising to the surface at night to feed.

The snake mackerel is caught as bycatch in the tuna longline fishery and is of minor commercial importance.

At the time of the Kon-Tiki voyage, the snake mackerel had never been known to have been caught.

The stomach of the swallower contained a snake mackerel (Gempylus serpens) 86 cm (34 in) long, or four times its length.