Art illustration - Oceans & Seas - Oarfish: { Regalecidae } longest ever sighted bony fish, reaching 17 m in length. The oar fish are thin and flattened. They have small and protuberant mouths, without visible teeth; the body is free of scales, instead having a cover guanine silver color and viscous consistency. The dorsal fin is red or pink, large, born just above the eyes and reaching the tail. She gets to have 400 thorns.