According to The Great Barrier Reef Foundation, a male blanket octopus weighs 40,000 times less than a female. It’s the largest size discrepancy that we currently know of in any animal on the ...

Blanket octopus pairs are some of the undersea world ... s length for the four species of these cephalopods. The tiny male detaches its hectocotylus—a modified arm that holds its sperm ...

The blanket octopus possesses the largest sex size discrepancy ... The female rips off the male’s arm, and stores it in her mantle cavity until she is ready to use it for fertilization.