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The fins of cirrate octopods are associated with a unique cartilage-like shell in a shell sac. In cross-section, the fins have distinct proximal and distal regions, both of which are covered by a thin surface sheath of muscle. The suborder is named for small, cilia-like strands (cirri) on the arms of the octopus, a pair for each sucker. These ...
Cirrothauma murrayi, the blind cirrate octopus, [2] is a nearly blind octopus whose eyes can sense light, but not form images. It has been found worldwide, usually 1,500 to 4,500 metres (4,900 to 14,800 ft) beneath the ocean's surface.
The cirrate octopods have a unique internal shell, positioned dorsally above the viscera and with a 'saddle-like' shape (or 'butterfly-like' in Cirrothauma due to the anterior corners being more drawn out). The lateral faces of the 'saddle' acting as large attachment sites for fin muscles, supporting proportionally large and powerful fins.
Additionally, the ability to squeeze into places predators may not be able to fit and/or reach allows individuals to hide. [13] A unique predatory evasion tactic that A. capricornicus possess is the ability to autotomize their arms, acting as a distraction to the predators, drawing attention away and allowing the octopus to escape. [3]
How the Octopus Solved the Problem in the Video. When you watch the video you can see the octopus discovers the fish inside the bottle but can’t get it out.
The Grimpoteuthis do not have an ink sac (as is the case with all cirrate octopuses). Furthermore, the cirrate octopuses lack innervated chromatophores and therefore are not capable of changing color [14] (despite some unreferenced statements to the contrary). [35] How cirrate octopuses escape or avoid predators is largely unknown.
Stauroteuthis is a genus of deepwater cirrate octopus, a cephalopod mollusk. This is the only genus in the family Stauroteuthidae , and only three species have been described in this genus. The organisms live below 700 m (2,300 ft) water depth; although sometimes found as deep as 4 km (2.5 mi) underwater, they generally live at a water depth of ...
Adult males are larger than females, with a total length of 482 mm and a weight of 5400 grams, while the females have a total length of 342 mm and a weight of 1650 g. [1] Females of the Opisthoteuthis calypso have been shown to have ovarian oocyte size frequency which is akin to species that show continuous egg production and release, alluding ...