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The mantle cavity is a central feature of molluscan biology. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. This space contains the mollusk's gills, anus, osphradium, nephridiopores, and gonopores. The mantle cavity functions as a respiratory chamber in most mollusks. In bivalves it is usually ...
In addition, tunics take up only 1% of the squid mantle's wall thickness, whereas the longitudinal muscle fibers take up to 20% of the mantle wall thickness in octopuses. [81] Also because of the rigidity of the tunic, the radial muscles in squid can contract more forcefully. The mantle is not the only place where squids have collagen.
Thysanoteuthis rhombus, also known as the diamond squid, diamondback squid, or rhomboid squid, is a large species of squid from the family Thysanoteuthidae which is found worldwide, throughout tropical and subtropical waters. T. rhombus is given its name for the appearance of the fins that run the length of the mantle. They are a fast growing ...
The Humboldt squid is the largest of the Ommastrephid squids, as some individuals may grow to 1.5 m (5 ft) in mantle length [17] [18] and weigh up to 50 kg (110 lb). [8] They appear to be sexually dimorphic : on average the females mature at larger sizes than the males. [ 19 ]
The squid grow up to an impressive 1.6 feet (counting the mantle, not the tentacles), all within a lifespan of six months to a year. Once they reproduce, they die. Once they reproduce, they die.
The mantle of Asperoteuthis acanthoderma is covered in minute, widely spaced tubercles of hyaline-like cartilage. In a 1990 study of dermal structures in squid, Clyde F. E. Roper and C. C. Lu wrote that they were "unable to suggest a function" for the tubercles of this species, but that due to their small size and spacing they were unlikely to ...
The funnel (light blue) is the site of rapid water expulsion following mantle contraction. The squid giant synapse is the largest chemical junction in nature. It lies in the stellate ganglion on each side of the midline, at the posterior wall of the squid's muscular mantle. Activation of this synapse triggers a synchronous contraction of the ...
Idioteuthis cordiformis is a species of whip-lash squid found in tropical regions of the west Pacific Ocean. The species is commonly known as the 'love-heart squid' because the species name cordiformis is Latin for 'heart shaped'. Recently, this species has been found to consume small birdbeak dogfish. [3]