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''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''. ==Bioluminescence== The sparkling enope squid is found in the Western Pacific ocean at depths of 183 to 366 metres (600–1200 feet) and is bioluminescent. Each tentacle has a photophore organ, which produces light. When flashed, the light attracts small fish, which the squid can feed upon. This squid has three visual pigments located in different parts of the retina which likely allows color discrimination, each having distinct spectral sensitivities. The sparkling enope squid measures about 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. It uses its ability to sense and to produce light for counterillumination camouflage: it matches the brightness and colour of its underside to the light coming from the surface, making it difficult for predators to detect it from below. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Watasenia scintillans」の詳細全文を読む スポンサード リンク
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