Tapetails
Before a report released in January 2009, the juveniles of the species were thought to belong to a separate taxonomic family Mirapinnidae in the Cetomimiform order, with three genera Eutaeniophorus, Mirapinna, and Parataeniophorus. These "tapetails", as they are also known, had been known exclusively from immature specimens, which live in shallower waters than the adults.
The tapetails are named for their caudal fins, which include a narrow streamer that may be longer than the fish's body. The genus Mirapinna, known as the Hairyfish, lacks the streamer, but has multiple hair-like growths on its body. All mirapinnids lack scales and fin rays. Mirapinnids are all small fish, less than 7 centimetres (2.8 in) in length. They feed on small crustaceans.
Read more about this topic: Flabby Whalefish