The giant oarfish (Regalecus glesne) is a species of oarfish of the family Regalecidae. It is an oceanodromous species with a worldwide distribution, excluding polar regions. Other common names include Pacific oarfish, king of herrings, ribbonfish, and streamer fish.

This species, Regalecus glesne, is listed in the Guiness Book of World Records as the longest bony fish alive. Its common name arises from its highly compressed and elongated body or from the old belief that the fish moves through the water by “rowing” itself with the pelvic fins.

oarfish, (Regalecus glesne), large, long, sinuous fish of the family Regalecidae (order Lampridiformes), found throughout the tropics and subtropics in rather deep water. A ribbon-shaped fish, very thin from side to side, the oarfish may grow to a length of about 9 metres (30.5 feet) and a weight of 300 kg (660 pounds).

Found in areas spanning from temperate ocean zones to tropical ones, yet rarely seen, the oarfish family contains three species in two genera. One of these, the giant oarfish (Regalecus glesne), is the longest bony fish alive, growing up to 17 m (56 ft) in length.

Oarfish (Regalecus glesne) is a bony fish that belongs to the family Regalecidae. They are known for their long, slender, and ribbon-like body that can grow up to 36 feet long. Oarfish have a unique physical appearance that sets them apart from other fish species.