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Genus Tremoctopus

(Blanket Octopuses)

(not octopi octopuses is correct when referring to different species)

Blanket octopuses are a genus of pelagic (open water) octopuses that live in most tropical oceans. They get the name blanket due to the fact that the females have long webbing on their tentacles which looks like a blanket. These species exhibit extreme sexual dimorphism as the females are alot bigger than males and have the webbing, whereas males are a few centimeters long and have no webbing. This webbing is used as a defense mechanism, when a predator approaches the female she unveils her webbing making her look alot bigger. They also have the Badass property of being immune to the Portuguese man o war’s toxin and actually rip off their tentacles and use them for defensive purposes.

Phylogeny

Animalia-Mollusca-Cephalopoda-Octopoda-Argonautoida-Tremoctopodidae-Tremoctopus

Image 1 Source, Image 2 Source.

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Blanket octopuses (Tremoctopus violaceus) are immune to the venomous Portuguese man o’ war, whose tentacles the small male (pictured top with man-o-war tentacle) and immature females rip off and use for defensive purposes. Also, unlike many other octopuses, the blanket octopus does not use ink to intimidate potential predators. When threatened, the female (pictured bttm) unfurls her large net-like membranes that spread out and billow in the water, greatly increasing her apparent size.

(via: Encyclopedia of Life)

(photos: T - Dhugal Lindsay/JAMSTEC/CMarZ, B - via Mission Blue)

Blanket Octopus - Tremoctopus spp.

Blanket octopodes (or octopuses, not octopi!!) get their name from the appearance of the female when she is threatened. Unlike most octopuses that produce ink, when threatened the female blanket octopus unveils a net-like membrane between her arms, making her look as big as possible.

Blanket octopuses have extreme sexual dimorphism. The female can reach lengths of over two metres whereas the males are only a few mere centimetres.

Blanket octopuses also have the unusual characteristic of being immune to the stinging tentacles of the Portuguese man o’ war. However, they do not feed on this creature, instead the octopuses rip off their tentacles and use them for their own defences.

BLANKET OCTOPUS  ©www.oversodoinverso.com

Tremoctopus is a genus of pelagic 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.

These species exhibit an extreme degree of sexual dimorphism. Females may grow to over 2 metres in length whereas the tiny males are at most a few centimeters long. The males have a specially modified third right arm which stores sperm, known as a hectocotylus. During mating, this arm detaches itself and crawls into the mantle of the female to fertilize her eggs. The male dies shortly after mating. The females carry over 100,000 tiny eggs that are attached to a sausage-shaped calcareous secretion held at the base of the dorsal arms and carried by the female until hatching.

These species have evolved an unusual defense mechanism: blanket octopuses are immune to the poisonous Portuguese man o’ war, whose tentacles the male and immature females rip off and use for defensive purposes. Also, unlike many other octopuses, the blanket octopus does not use ink to intimidate potential predators. When threatened, the female unfurls her large net-like membranes that spread out and billow in the water, greatly increasing her apparent size.

Fact Source: http://en.wikipedia.org/wiki/Blanket_octopus

Other photos you may enjoy:

Common Octopus (with 96 arms)

Octopus Camouflage

Blue-Ringed Octopus

Watch on goodbyetoyesterday.tumblr.com

This would be a tremoctopus also known as the blanket octopus. It got this nickname do to the unique defense mechanism the females can utilize. If provoked she’ll unfurl a large net like membrane that makes her appear drastically bigger then she actually is. This is her primary defense mechanism as unlike most octopi the tremoctopus do not use ink to detour predators.

The defense mechanism isn’t the only thing that’s unique to the tremoctopus, the way they mate is also extremely unique. Female tremoctopus can grow up to two meters in length whereas the males only grow to a few centimeters and due to this extreme size difference the males have a specially modified third right arm which stores sperm, known as a hectocotylus. During mating, this arm detaches itself and crawls into the mantle of the female to fertilize her eggs. The male will parish shortly after. 

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