Opisthoteuthis chathamensis
Opisthoteuthis chathamensis, commonly known as the roughy umbrella octopus, is a species of cirrate octopus restricted to demersal habitats surrounding the Chatham Rise in New Zealand.
on, description &; threats
Specimens have been recorded solely on soft sediments from deep. The type locality of O. chathamensis is near the Chatham Islands at 44°44'S, 77°15'W,. The species is known only from this area of the Chatham Rise and off the eastern and. O. chathamensis reaches a maximum length of TL, and a mantle length of. They are described as having subequal arms with around 41-45 suckers in males and 45-55 suckers in females. Their oral surface and the webbing between their tentacles is maroon and the suckers are a pale cream. O. 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 has made them particularly susceptible to population declines and slow recoveries.