The Giant Oarfish, also known scientifically as Regalecus glesne, is the longest bony fish in the world. Shaped like a ribbon and able to swim by wriggling its body in a serpentine motion, the Giant Oarfish is believed to have been mistaken for a sea serpent on occasion. Named after its oar shaped pelvic fins that are shaped like oars, other notable characteristics of the Giant Oarfish include its dorsal fin along the full length of its body, stout pectoral fins, and silvery color accented with dark markings and red fins. The Giant Oarfish tends to follow its prey throughout the ocean, instead of remaining in a single geographical location, but is typically found in the tropics and middle ocean.

There is a lot of speculation about the Giant Oarfish but what we know is that it is the world's longest bony fish, lacks scales, eats tiny planktons, and can even predict earthquakes. It is rarely seen since it lives in deep waters of all oceans except those of the polar regions. It is also called ribbonfish, streamer fish, king of herrings, or Pacific oarfish. This fish is highly migratory.