description Taningia danae Overview
Taningia danae, commonly known as the Dana octopus squid, is a large deep-sea squid in the family Octopoteuthidae. The species can reach a mantle length of approximately 1.7 meters and a total length of up to 2.3 meters, making it one of the largest bioluminescent animals known. Adults lack tentacles entirely and possess prominent photophores at the tips of the second pair of arms, among the largest light-producing organs found in any animal. The species is distributed across tropical and temperate oceans worldwide and was named in honor of Danish fisheries biologist Åge Vedel Tåning.
insights Ranking position
Taningia danae ranks #34 of 261 in the Squid ranking, behind European Common Squid (Loligo vulgaris), ahead of Spirula spirula.
help Taningia danae FAQ
Why does Taningia danae have only eight arms instead of the usual squid arrangement?
Adult Taningia danae lose the two long feeding tentacles retained by many other squid, leaving eight hooked arms. Two arms carry unusually large photophores at their tips, but the light organs do not literally replace the missing tentacles.
How does Taningia danae use its bioluminescent arm tips?
Scientists have filmed the squid producing short flashes while attacking bait and longer glows under other conditions. Its paired arm-tip photophores emit blue-green light and may help illuminate prey, startle animals, or communicate.
How large can a Dana octopus squid become?
A well-documented mature female measured about 2.3 meters in total length and weighed roughly 61 kilograms. That makes Taningia danae one of the largest known bioluminescent animals.
Where does Taningia danae live, and can divers encounter it?
It inhabits deep tropical, subtropical, and temperate ocean waters around the world, often hundreds of meters below the surface. Encounters by ordinary scuba divers are therefore extremely unlikely, and much of its behavior has been recorded with deep-sea cameras.
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