Watasenia scintillans

From Wikipedia, the free encyclopedia
  (Redirected from Sparkling Enope Squid)
Jump to: navigation, search
Sparkling enope squid
Watasenia scintillans.jpg
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Teuthida
Family: Enoploteuthidae
Genus: Watasenia
Ishikawa, 1914
Species: W. scintillans
Binomial name
Watasenia scintillans
(Berry, 1911)

Watasenia scintillans, also known as the sparkling enope squid or firefly squid, is a species of squid in the family Enoploteuthidae. It is the sole species in the genus Watasenia.

Species characteristics[edit]

Sparkling in the dark, deep sea

The sparkling enope squid is found in the Western Pacific ocean at depths of 183 to 366 metres (600–1200 feet) and exhibits bioluminescence. Each tentacle has an organ called a photophore, which produces light. When flashed, these lights attract small fish, on which the squid can then feed.

This squid has three visual pigments located in different parts of the retina which likely allows color discrimination, each having distinct spectral sensitivities.[1]

The sparkling enope squid measures about 3 inches (7.6 cm) long at maturity and dies after one year of life. It has the standard eight arms and two tentacles, with one pair each having three, bright light-emitting organs at the tips.

The squid spends the day at depths of several hundred metres, returning to the surface when night falls. The combination of light-sensing and light-producing organs enable it to match its underside to the brightness and colour coming from the surface (counter-illumination), making it hard for predators from below to detect it.

Mating[edit]

The firefly squid can also light up its whole body to attract a mate. The mating season lasts from March to June.

Commercial use[edit]

This squid is commercially fished in Japan, accounting for an annual catch of 4,804 to 6,822 tons from 1990 to 1999. [2]

See also[edit]

References[edit]

  1. ^ "Map of Life - 'Colour vision' in Firefly squid". Convergent Evolution Online. University of Cambridge. Retrieved 6 November 2012. 
  2. ^ Tsuchiya, Kotaro. 2007. Watasenia Ishikawa 1914. Watasenia scintillans. Version 16 June 2007 (under construction). http://tolweb.org/Watasenia_scintillans/19645/2007.06.16 in The Tree of Life Web Project, http://tolweb.org/

External links[edit]