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The rings are roughly circular in shape and are based on a darker blotch than the background color of the skin. A black line, with thickness varying to increase contrast and visibility, borders the electric blue circles. The blue rings are an aposematic adornment to clearly show to all potential predators that the octopus is highly venomous ...
The octopus can squeeze through tiny gaps; even the larger species can pass through an opening close to 2.5 cm (1 in) in diameter. [30] Lacking skeletal support, the arms work as muscular hydrostats and contain longitudinal, transverse and circular muscles around a central axial nerve. They can extend and contract, twist to left or right, bend ...
Cryptoteuthis brevibracchiata is a bell-shaped octopus with a semi-gelatinous, semi-transparent body, except for the dark tips of the oral web and the tips of the fins. The fins are small and round, and their length is equal to half the width of the head.
Opisthoteuthis calypso or calypso flapjack octopus is a species of genus Opisthoteuthis, which are known as the cirrate octopuses. Octopuses in this genus are known as the flapjack octopuses and can be found in a variety of oceans across the world.
Close-up of the chromatophores on Octopus bimaculoides. The California two-spot octopus (Octopus bimaculoides), often simply called a "bimac", is an octopus species native to many parts of the Pacific Ocean including the coast of California. One can identify the species by the circular blue eyespots on each side of its head.
Their shells are somewhat saddle-shaped. C. magna is the sister taxon of Cirrothauma murrayi, but can be readily distinguished by having large and well developed eyes (whereas C. murrayi is near blind). [4] Cirrothauma magna is likely the largest species of cirrate octopus, one female specimen measuring 1.7 m total length. [5]
The resulting robotic gripper is therefore superior for grasping round, concave, flat, or irregularly shaped objects when visibility is low or conditions are turbid. [12] Another innovation inspired by the glowing sucker octopus are self-healing, photoswitchable and reversible fluorescent eutectogels. [13]
The curled octopus (Eledone cirrhosa), also known as the horned octopus, [4] lesser octopus or northern octopus, [5] is a species of cephalopod found in the northeast Atlantic, ranging from Norway to the Mediterranean, including the British Isles. The total length of an adult is around 50 cm, but their arms are often tightly curled.