Species of squid
Octopoteuthis deletron squid in the genus Octopoteuthis family Octopoteuthidae . They belong to the pelagic squids of order Oegopsida . Found at depths of 400 to 800 m (1,300 to 2,600 ft) in the Pacific Ocean , they have been known to grow to 24 cm (9.4 in).
Biology
Trophic ecology
This species is described as an inactive predator, having a lower metabolism and relying on ambush ,[ 3] [ 4] trophic level than glass squids and active hunters like Todaropsis eblanae [ 5]
O. deletron has been found to break off its arms as a defense strategy. The squid digs hooks in one of its arms into a predator and jets away, leaving the arm in the predator's skin.[ 6]
O. deletron are the most common species found in the stomachs of northern elephant seals sampled off the coast of California.[ 7] giant grenadier .[ 8] Perrin's beaked whale (Mesoplodon perrini ).[ 6]
Reproduction
The male O. deletron has a penis , which is unusual among squids. Males find it difficult to detect the sex of other individuals they encounter in the dark depths, so they have adopted a strategy of attaching sperm packets to all individuals they meet.[ 9] moniker of "bisexual squid".[ 10] [ 11] [ 12]
References
^ Barratt, I.; Allcock, L. (2014). "Octopoteuthis deletron " . IUCN Red List of Threatened Species 2014 : e.T163334A999352. doi :10.2305/IUCN.UK.2014-1.RLTS.T163334A999352.en . Retrieved 19 November 2021 . ^ Julian Finn (2016). "Octopoteuthis deletron Young, 1972" . World Register of Marine Species Flanders Marine Institute . Retrieved 10 March 2018 . ^ Goetsch, Chandra; Conners, Melinda G.; Budge, Suzanne M.; Mitani, Yoko; Walker, William A.; Bromaghin, Jeffrey F.; Simmons, Samantha E.; Reichmuth, Colleen; Costa, Daniel P. (20 November 2018). "Energy-Rich Mesopelagic Fishes Revealed as a Critical Prey Resource for a Deep-Diving Predator Using Quantitative Fatty Acid Signature Analysis" . Frontiers in Marine Science . 5 : 430. Bibcode :2018FrMaS...5..430G . doi :10.3389/fmars.2018.00430 ^ Henk-Jan T. Hoving; Jose Angel A. Perez; Kathrin S.R. Bolstad; Heather E. Braid; Aaron B. Evans; Dirk Fuchs; Heather Judkins; Jesse T. Kelly; José E.A.R. Marian; Ryuta Nakajima; Uwe Piatkowski; Amanda Reid; Michael Vecchione; José C.C. Xavier (2014). Chapter Three - The Study of Deep-Sea Cephalopods, in Advances in Cephalopod Science: Biology, Ecology, Cultivation and Fisheries 235– 359. ISBN 9780128002872 . Retrieved 11 April 2025 . ^ Kremer, Kira Izabela; Hagen, Wilhelm; Oesterwind, Daniel; Duncan, Sabrina; Bode-Dalby, Maya; Dorschner, Sabrina; Dudeck, Tim; Sell, Anne F. (2025-01-28). "Trophic ecology of squids in the Benguela Upwelling System elucidated by combining stomach content, stable isotope and fatty acid analyses" . Marine Biology . 172 (2): 32. doi :10.1007/s00227-024-04592-2 ISSN 1432-1793 . ^ a b Stromberg, Michael. "This Deep-Sea Squid Breaks Off Its Own Arms to Confuse Predators" . Smithsonian.com . With video. Retrieved August 4, 2012 . ^ Le Beouf, Burney J.; Richard M. Laws (1994). Elephant Seals: Population ecology, behavior, and physiology . University of California Press. pp. 213– 214. ISBN 978-0-520-08364-6 ^ Drazen, Jeffrey C; Buckley, Troy W; Hoff, Gerald R (2001). "The feeding habits of slope dwelling macrourid fishes in the eastern North Pacific". Deep-Sea Research Part I: Oceanographic Research Papers . 48 (3): 909– 935. Bibcode :2001DSRI...48..909D . doi :10.1016/S0967-0637(00)00058-3 . ^ Gorman, James (21 September 2011), "Amorous Squid Seeks Partner: Any Sex Will Do" , The New York Times , New York, p. A1 ^ Watson, Traci. "Squid Males "Bisexual"—Evolved Shot-in-the-Dark Mating Strategy" . nationalgeographic.com . National Geographic. Retrieved 11 April 2025 . ^ Morelle, Rebecca (21 September 2011). "Light shed on bisexual and promiscuous deep-sea squid" . bbc.com . British Broadcasting Corporation. Retrieved 11 April 2025 . ^ Pappas, Stephanie (21 September 2011). "Bisexual squid species isn't picky about mate" . nbcnews.com . NBCUniversal Media. Retrieved 11 April 2025 .
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