Bioluminescent Countershading in Midwater Animals: Evidence from Living Squid
- 12 March 1976
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 191 (4231), 1046-1048
- https://doi.org/10.1126/science.1251214
Abstract
Midwater squid respond to overhead illumination by turning on numerous downward-directed photophores; they turn off the photophores when overhead illumination is eliminated. The squid are invisible when the intensity of the photophores matches the intensity of the overhead illumination. These results strongly support the theory of ventral bioluminescent countershading.Keywords
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