Oarfish

Oarfish are the three species of large and extremely long pelagic lampriform fish belonging to the small family Regalecidae. Found in areas spanning from temperate ocean zones to tropical ones, yet rarely seen by humans. The giant oarfish is the longest bony fish alive, growing up to about 8 m (26 ft) in length.

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Local Names: Doomsday fish, Ribbonfish

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The oarfish inhabits the epipelagic to mesopelagic ocean layers, ranging from 250–1,000 m (820–3,280 ft) and is rarely seen on the surface. A few have been found still barely alive, but usually if one floats to the surface, it dies due to depressurisation. At the depths the oarfish live, there are few or no currents. As a result, they build little muscle mass and they cannot survive in shallower turbulent water.​