Critically Endangered
Opisthoteuthis chathamensis
Opisthoteuthis chathamensis
Opisthoteuthis chathamensis is a cephalopod in the family Opisthoteuthidae (order Octopoda), recorded as Critically Endangered and tied to New Zealand.
The cephalopod
Opisthoteuthis chathamensis reaches a maximum length of 18 cm (7.1 in) TL, and a mantle length of 5.4 cm (2.1 in).
Range and habitat
The type locality of O. Chathamensis is near the Chatham Islands at 44°44'S, 77°15'W, 1,180 m (3,870 ft), and was found more broadly around the Chatham Rise, off New Zealand, over a depth range of 900–1,438 metres (2,950–4,720 ft), living on soft sediments.. The species has also more recently been collected from Macquarie Island, to the South West of New Zealand. Opisthoteuthis chathamensis is a cirrate octopus found in demersal habitats surrounding the Chatham Rise in New Zealand and Macquarie Island (Australian Antarctic Territories).
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
In crisis
Opisthoteuthis chathamensis is listed as Critically Endangered by the IUCN due to a 70% decrease in population size in recent years, and has not been seen since 1999, when it was a common bycatch species. In addition, their longevity, low fecundity and slow growth (especially embryonic development that lasts 1.4-2.6 years among other species in the genus) has made them particularly susceptible to population declines and slow recoveries.
Opisthoteuthis chathamensis is Critically Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Opisthoteuthis chathamensis, Wikidata item Q1962701. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.



