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Biol. Bull. 205: 102-109. (October 2003)
© 2003 Marine Biological Laboratory

Light Production by the Arm Tips of the Deep-Sea Cephalopod Vampyroteuthis infernalis

Bruce H. Robison*, Kim R. Reisenbichler, James C. Hunt1 and Steven H. D. Haddock

Monterey Bay Aquarium Research Institute, 7700 Sandholdt Rd., Moss Landing, California 95039

* To whom correspondence should be addressed. E-mail: robr{at}mbari.org

The archaic, deep-sea cephalopod Vampyroteuthis infernalis occurs in dark, oxygen-poor waters below 600 m off Monterey Bay, California. Living specimens, collected gently with a remotely operated vehicle (ROV) and quickly transported to a laboratory ashore, have revealed two hitherto undescribed means of bioluminescent expression for the species. In the first, light is produced by a new type of organ located at the tips of all eight arms. In the second, a viscous fluid containing microscopic luminous particles is released from the arm tips to form a glowing cloud around the animal. Both modes of light production are apparently linked to anti-predation strategies. Use of the tip-lights is readily educed by contact stimuli, while fluid expulsion has a much higher triggering threshold. Coelenterazine and luciferase are the chemical precursors of light production. This paper presents observations on the structure and operation of the arm-tip light organs, the character of the luminous cloud, and how the light they produce is incorporated into behavioral patterns.




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