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A comment on Massive octopus nursery found in deep sea. Parent comment

Re:Massive octopus nursery found in deep sea by toephu2 on Wednesday October 31, 2018 @02:30AM (#18343722)
from the video they definitely look larger than 4 inches in diameter..
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Re:Massive octopus nursery found in deep sea by pvaldes on Wednesday October 31, 2018 @07:03AM (#18344678)
CORRECTED: Is the length of the mantle. The round inflatable part close to the head. Tentacles and 'head' sensu-stricto are excluded.

Cephalopods will change a lot its length when tentacles are retracted (dead animal) or relaxed (alive), so 'mantle lenght' is used instead as a sort of equivalent to body length. Is a much less variable measure.

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