A squid with shiny, bioluminescent "spotlights" tipping two of its arms & what look like waxy red lips shared a close encounter with a remotely operated vehicle (ROV) in deep ocean waters near Hawaii.
And the underwater face-to-face was captured in a spectacular video by cameras attached to the ROV, operated by the National Oceanic & Atmospheric Association (NOAA) Office of Ocean Exploration & Research.
The squid even attached itself to the vehicle & "hung out there for several minutes," according to a dive update posted on NOAA's Okeanos Ocean Explorer website.
Though initially identified by a scientist on the vessel as a "whiplash squid," the cephalopod was actually a Dana octopus squid, or Taningia danae. That animal is similar in size to a whiplash squid, yet lacks the two long feeding tentacles that are usual in most other squids. [See Images of the Shiny Dana Octopus Squid]
The deepwater star of the video is estimated to measure between 3 & 7 feet (1 & 2 meters) in length. Broad, flexible fins extend from the squid's mantle; as they furl & flap, these fins steer T. danae through the water.
On the underside of the mantle protrudes a shape resembling a red-lipped mouth. It's really a siphon, however, used to eject water from the mantle cavity behind the eyes & propel the animal in reverse, said Scott France, a marine biologist & co-science-lead on the NOAA expedition, whose voiceover describes the squid on the video.
While the Dana octopus squid may lack a squid's trademark trailing tentacles, it makes up for them in spectacular lighting equipment, with two of its muscular arms ending in lidded light organs called "photophores." About the size of lemons, these photophores are the largest known light-producing organs in the animal kingdom, said Mike Vecchione, a zoologist at the NOAA National Systematics Laboratory at the Smithsonian Institution & a curator of cephalopods at the National Museum of Natural History, both in Washington, D.C.
In two video clips â€” one dated Sept. 19 & one dated Sept. 24 â€” an octopus squid swims close to Deep Discoverer, a remote-controlled marine-exploration vehicle operated from the Okeanos Explorer vessel, part of NOAA's Hohonu Moana Expedition that's exploring deep waters off Hawaii. And both clips show the squid's photophores lighting up, as the lids covering them were lifted.
Flashing these high beams could be a defensive move, Vecchione told Live Science. In the darkness of the ocean depths, a sudden flash of light could temporarily blind a predator, giving the squid a chance to escape, he said.
Vecchione suggested that the squid might moreover use light flashes to startle prey, making them freeze just long enough for the squid to grab hold.
According to Vecchione, the squid's flashing at the ROV could support another hypothesis approximately how ocean creatures use bioluminescence, lighting up as a way to attract a bigger predator to attack the more immediate threat.
The Hohonu Moana Expedition lasted from July 10 to Sept. 30, investigating deep-sea ecosystems & capturing video & imagesÂ of the strange underwater life â€” huge & small, drab & flashy â€” that inhabits them.
Follow Mindy Weisberger on TwitterÂ and Google+. Follow us @livescience, FacebookÂ & Google+. Original article on Live Science.
In Photos: The Wonders of the Deep Sea The 7 Weirdest Glow-in-the-Dark Creatures Marine Marvels: Spectacular Photos of Sea Creatures Copyright 2015 LiveScience, a Purch company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.