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allopelagic

adjective
al·​lo·​pe·​lag·​ic

Definition of allopelagic 

: of or relating to marine organisms occurring irregularly at the surface or at varying depths in response to influences other than temperature

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First Known Use of allopelagic

1891, in the meaning defined above

History and Etymology for allopelagic

International Scientific Vocabulary all- + pelagic; originally formed as German allopelagisch

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The first known use of allopelagic was in 1891

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