In July 1992, the Nautile again came across these creatures, first observing one individual two times during a dive off the coast of Ghana at 3☄0′N 2☃0′W and 3,010 metres (9,880 ft) depth, and then another one off Senegal at 2,950 metres (9,680 ft). The crew of the submersible Nautile encountered a long-armed squid off the coast of northern Brazil, 10☄2.91′N 40★3.43′W, at a depth of 4,735 metres (15,535 ft). A was described as Magnapinna atlantica in 2006.The first visual record of the long-arm squid dates back to September 1988. Researchers Michael Vecchione and Richard Young were the chief investigators of the finds, and eventually linked them up to the two previous specimens, erecting the family Magnapinnidae in 1998, with Magnapinna pacifica as the type species.Of particular interest was the very large fin size, up to 90% of the mantle length, that was responsible for the animals’ common name.A single specimen of a fifth species, Magnapinna sp. A), and three more were found in the Pacific ( Magnapinna pacifica). The specimen was illustrated in Alister Hardy‘s The Open Sea (1956), where it was identified as Octopodoteuthopsis.During the 1980s, two additional immature specimens were found in the Atlantic ( Magnapinna sp.
C) was caught in the South Atlantic, but little was thought of it at the time. In 1956, a similar squid ( Magnapinna sp. However, due to the damaged nature of the find, very little information could be discerned and it was classified as a mastigoteuthid, first as Chiroteuthopsis talismani and later as Mastigoteuthis talismani. Since none of the seemingly adult specimens have ever been captured or sampled, it remains uncertain if they are of the same genus or only distant relatives.The first record of this family comes from a specimen ( Magnapinna talismani) caught off the Azores in 1907. 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. Bigfin squids are a group of rarely seen cephalopods with a distinctive morphology.
0 kommentar(er)
