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Tremoctopus is a genus of cephalopods, containing four species that occupy surface to mid-waters in subtropical and tropical oceans. They are commonly known as blanket octopuses, in reference to the long, transparent webs that connect the dorsal and dorsolateral arms of the adult females. The other arms are much shorter and lack webbing.

Tremoctopus violaceus exhibits the most extreme degree of sexual size-dimorphism known in any non-microscopic animal. Females may reach 6.6 feet in length, whereas the males are around one inch. The last photo shows a close up of the male octopus.

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