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Bigfin Reef Squid (Sepioteuthis lessoniana)

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The bigfin reef squid (Sepioteuthis lessoniana), a member of the pencil squid family Loliginidae, ranges from the rocky shorelines and near-shore reefs of the Indian and Pacific oceans, where it feeds mainly on crustaceans and small fish. This squid’s common name derives from the large oval fin that extends almost around its entire mantle, giving it a similar appearance to a cuttlefish. Like many other cephalopods, S. lessoniana is capable of rapid, dramatic changes in body coloration and patterning, including displays of vivid iridescence. Bigfin reef squids grow to maturity very quickly, but are a correspondingly short-lived species, with a maximum recorded lifespan of about ten months.

Shutterstock # 412258393

David Litman/

from the May/Jun17 issue, pages 4-5


Posted June 5th, 2017.

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