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An octopus (pl.: octopuses or octopodes [a]) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ ɒ k ˈ t ɒ p ə d ə /, ok-TOP-ə-də [3]). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.
Certain squid species possess a tail, which is an extension of the body past the fins. [5] The tail may be said to start at "the point where a hypothetical line, continuous with the broad posterior edge of the fin, crosses the midline of the body". [ 1 ]
Octopuses swim headfirst, with arms trailing behind. While most cephalopods can move by jet propulsion, this is a very energy-consuming way to travel compared to the tail propulsion used by fish. [67] The efficiency of a propeller-driven waterjet (i.e. Froude efficiency) is greater than a rocket. [68]
They are nicknamed "Dumbo" octopuses because of their ear-like fins that protrude out of their bodies like elephants. They tend to live on the seafloor or hover just slightly above, ...
Many octopus arm anomalies have been recorded, [13] [14] including a 6-armed octopus (nicknamed Henry the Hexapus), a 7-armed octopus, [15] a 10-armed Octopus briareus, [16] one with a forked arm tip, [17] octopuses with double or bilateral hectocotylization, [18] [19] and specimens with up to 96 arm branches.
The octopuses seen in the videos threw silt, shells, and algae at other nearby octopuses. To do so, they gathered up the debris underneath their bodies using their arms. They then used their ...
The octopus is one of the most unexplainable animals on the planet, contested only by the platypus, the echidna, and the angler fish. And trust us, you don't know squat about what it can do.View ...
Grimpoteuthis [1] is a genus of pelagic cirrate (finned) octopods known as the dumbo octopuses. [2] The name "dumbo" originates from their resemblance to the title character of Disney's 1941 film Dumbo, having two prominent ear-like fins which extend from the mantle above each eye. There are 17 species recognized in the genus. [3] [4]