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Georges Cuvier's original illustration of an octopus hectocotylus, which he named Hectocotyle octopodis. A hectocotylus (pl.: hectocotyli) is one of the arms of male cephalopods that is specialized to store and transfer spermatophores to the female. [1]
Histioteuthis heteropsis, known as the strawberry squid, is a species of small cock-eyed squid. [2] The scientific nomenclature of these squid stems from their set of differently sized eyes, one being small and blue and the other being large and yellow.
Squid, on the other hand, can be found to travel vast distances, with some moving as much as 2,000 km in 2.5 months at an average pace of 0.9 body lengths per second. [81] There is a major reason for the difference in movement type and efficiency: anatomy.
Needham's sac (also called a spermatophore sac) is the part of the reproductive tract of cephalopods in which spermatophores are stored. Spermatophores are complex structures consisting of ropes of sperm and in some species include an ejaculatory apparatus and a cement body. Needham's sac opens into the left side of the mantle cavity.
The hyponome or siphon is the organ used by cephalopods to expel water, a function that produces a locomotive force. The hyponome developed from the foot of the molluscan ancestor. [14] Water enters the mantle cavity around the sides of the funnel, and subsequent contraction of the hyponome expands and then contracts, expelling a jet of water.
The squid floats along the water upside down with one eye aimed at the ocean floor and the other looking above. Named for its bright red color, the squid has red-tinted photophores (light-emitting ...
Taningia danae, the Dana octopus squid, is a species of squid in the family Octopoteuthidae. It is one of the largest known squid species, reaching a mantle length of 1.7 m (5.6 ft) [3] and total length of 2.3 m (7.5 ft). [4] The largest known specimen, a mature female, weighed 161.4 kg (356 lb). [5]
Uroteuthis singhalensis is a species of squid characterized by its long, slender body shape. The mantle (main body) is cylindrical, tapering to a sharp point at the rear, and is about 4–7 times as long as it is wide in mature individuals. The fins are relatively narrow and rhombic (diamond-shaped) in outline, extending for about half the ...