Which is the longest known bony fish in the ocean?

The giant oarfish ("Regalecus glesne") is a species of oarfish of the family "Regalecidae". It is an oceanodromous species with a global distribution, excluding polar regions. Other not unusual place names include Pacific oarfish, king of herrings, ribbonfish, and streamer fish.

R. glesne or an oarfish is the world's longest bony fish. Its form is ribbon-like, slim laterally, with a dorsal fin alongside its complete length, stubby pectoral fins, and long, oar-shaped pelvic fins, from which its not unusual place call is derived. Its colour is silvery with darkish markings, and its fins are red. Its bodily traits and its undulating mode of swimming have caused hypothesis that it is probably the supply of many "sea serpent" sightings.

This species is the world's longest bony fish, achieving a document duration of 8 m (26 ft); however, unconfirmed specimens of as much as 11 m (36 ft) were reported. It is typically measured to 3 m (9.8 ft) in overall duration. The most recorded weight of a large oarfish is 270 kg (600 lb).

Its shape is ribbonlike, narrow laterally, with a dorsal fin along its entire length from between its eyes to the tip of its tail. The fin rays are soft and may number up to 400 or more. At the head of the fish, the rays are lengthened forming a distinctive red crest. Its pectoral and pelvic fins are nearly adjacent. Its head is small with the protrusible jaw typical of lampriforms; it has 40 to 58 gill rakers, and no teeth.