Pyroteuthis addolux

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Pyroteuthis addolux
Scientific classification edit
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Oegopsida
Family: Pyroteuthidae
Genus: Pyroteuthis
P. addolux
Binomial name
Pyroteuthis addolux
{Richard E. Young

Pyroteuthis addolux is a species of squid in the family Pyroteuthidae. It is distinguished from other members of the genus Pyroteuthis by the shape of photophores on the tentacles and the shape of the hectocotylus. The hectocotylus is located on arm IV, containing 10 proximity hooks, and six to 15 suckers at the tip. P. addolux ranges from south of the Hawaiian Islands, to the subantarctic boundary. They exhibit minor geographical variance, as southern specimens are slightly smaller than their northern counterparts. P. addolux is the only member of the genus to occur in the North Pacific, but additional members of the family Pyroteuthidae have also been found.[2] The species has been observed using bioluminescence to reduce its silhouette in dim surrounding light. The type specimen was taken off southern California and described in 1972 by Richard E. Young.[3]

Pyroteuthis addolux apparentlyt undergoes a diel vertical migration in which spends th day at depths of 450-500 mbefore ascending to 150-200m at night to feed, most likely on copepods and other small crustaceans. The larger individuals do not appear to migrate each night. The oocytes contained in the ovary of a sexually mature female had a length of 1.0mm, when they hatch they produce planktonic paralarva. The males have short spermatophores.[1]


  1. ^ a b Barratt, I. & Allcock, L. (2014). "Pyroteuthis addolux". The IUCN Red List of Threatened Species. 2014: e.T163089A971624. doi:10.2305/IUCN.UK.2014-1.RLTS.T163089A971624.en. Downloaded on 18 March 2018.
  2. ^ Richard Brodeur and Orio Yamamura. 2005. MICRONEKTON OF THE NORTH PACIFIC, North Pacific Marine Science Organisation (PICES): pg21.
  3. ^ Young, Richard E. & Katharina M. Mangold (1922-2003) (2016). "Pyroteuthis addolux Young, 1972. Version 16 November 2016 (under construction)". The Tree of Life Web Project.