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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.
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 ...
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.
Cirroteuthis muelleri is a deep sea species. It is found in cold seas in the boreal Arctic, the north Atlantic Ocean, and the north Pacific Ocean. [1] In the southern hemisphere at least three specimens have been captured of Cirroteuthis cf. muelleri from New Zealand and Australia, which may represent a new species.
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.
Cirrothauma magna, also known as the big-eye jellyhead, [2] is a species of deep-sea cirrate octopus that has been found in the Indian, Atlantic, and Pacific oceans. It is known from four damaged specimens. [3]
Cirroctopus hochbergi (common name: Four-blotched umbrella octopus [3] [4]) is a cirrate octopus living between 800 and 1,070 meters deep off the coast of New Zealand. The species is known from 48 specimens. [5]