The long-armed squid observed north of Hawai'i in 2001, showing the extremely large fins of this specimen Ī third video taken from the remotely operated underwater vehicle (ROV) of the oil-drilling ship Millennium Explorer in January 2000, at Mississippi Canyon in the Gulf of Mexico ( 28☃7′N 88☀0′W / 28.617°N 88.000°W / 28.617 -88.000 ( Bigfin squid (sighting 2000, Millennium Explorer))) at 2,195 metres (7,201 ft), allowed a size estimate. In November 1998, the Japanese crewed submersible Shinkai 6500 filmed another long-armed squid in the Indian Ocean south of Mauritius, at 32☄5′S 57☁3′E / 32.750°S 57.217☎ / -32.750 57.217 ( Bigfin squid (sighting 1998)) and 2,340 metres (7,680 ft). In July 1992, the Nautile again encountered these creatures, first observing one individual two times during a dive off the coast of Ghana at 3☄0′N 2☃0′W / 3.667°N 2.500°W / 3.667 -2.500 ( Bigfin squid (sighting 1992)) and 3,010 metres (9,880 ft) depth, and then another one off Senegal at 2,950 metres (9,680 ft). The first visual record of the long-arm squid was in September 1988. However, they did all have large fins, and were therefore named "magna pinna", meaning "big fin". The genus was described from two juveniles and paralarva, none of which had developed the characteristic long arm tips. A was described as Magnapinna atlantica in 2006. Of particular interest was the very large fin size, up to 90% of the mantle length, that was responsible for the animals' common name.Ī single specimen of a fifth species, Magnapinna sp. Researchers Michael Vecchione and Richard Young were the chief investigators of the finds, and eventually linked them to the two previous specimens, erecting the family Magnapinnidae in 1998, with Magnapinna pacifica as the type species. A), and three more were found in the Pacific ( Magnapinna pacifica). ĭuring the 1980s, two additional immature specimens were found in the Atlantic ( Magnapinna sp. The specimen was illustrated in Alister Hardy's The Open Sea (1956), where it was identified as Octopodoteuthopsis. C) was caught in the South Atlantic, but little was thought of it at the time. In 1956, a similar squid ( Magnapinna sp. Due to the damaged nature of the find, little information could be discerned, and it was classified as a mastigoteuthid, first as Chiroteuthopsis talismani and later as Mastigoteuthis talismani. The first record of this family comes from a specimen ( Magnapinna talismani) caught off the Azores in 1907. These appendages are held perpendicular to the body, creating "elbows." How the squid feeds is yet to be discovered. The arms and tentacles of the squid are both extremely long and believed to be 4 to 8 m (13 to 26 ft) long. Since none of the seemingly adult specimens has ever been captured or sampled, it remains uncertain if they are of the same genus or only distant relatives. Several videos have been taken of animals nicknamed the " long-arm squid", which appear to have a similar morphology. Although the family is known only from larval, paralarval, and juvenile specimens, some authorities believe adult specimens have also been seen. They are placed in the genus Magnapinna and family Magnapinnidae. Magnapinna talismani ( Fischer & Joubin, 1907)īigfin squids are a group of rarely seen cephalopods with a distinctive morphology.Magnapinna pacifica Vecchione & Young, 1998.
Magnapinna atlantica Vecchione & Young, 2006.
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