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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 ...
Chiroteuthis imperator. The Chiroteuthidae are most notable for their unique paralarval stage, known as the doratopsis [2] stage. Although morphology varies greatly within the family, the Chiroteuthidae are distinguished by their extremely elongated bodies and (in most species) tentacles; the latter may be up to four times the mantle length in Asperoteuthis acanthoderma.
Enoploteuthidae is a family of squid comprising approximately 40 species in four genera. Most species have a mantle length ranging from 3–13 cm (1.2–5.1 in). Hooks are present on all arms and tentacles. The family is best known for the large array of photophores throughout the body.
Within the mantle cavity there are three visceral photophores, an oval, anal photophore, a posterior intestinal photophore and an elongated posterior visceral photophore which forms a strip. [4] It has a broad head which is at least as wide as the mantle and there is an elongated photophore patch on the ventral surface of both eyes. [3]
The mantle is cup-shaped and elongates considerably in females when they mature. The fins are a third to a half the length of the mantle and roughly half its width. The ventral (under) surface of the mantle has a complex arrangement of large and small compound light-emitting photophores , and seventeen large and one small photophore surround ...
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 is conical and elongated with a narrow rear tip. The mantle walls are thin and leathery. The funnel locking-apparatus are small and oval to spindle-shaped. A single cartilaginous tubercle is present at the mantle margins, though rarely it may be absent. The fins are long and narrow, starting at about 40 to 60% of the length of the ...
Adult males usually have a mantle length of 29 to 32 cm (0.95 to 1.05 ft), but can reach the maximum length of 45 cm (1.48 ft). Adult females are much larger, usually having a mantle length of around 50 cm (1.6 ft), with the maximum known length being 60 cm (2.0 ft). [3] [5] A freshly caught neon flying squid from Northern Hawaiian waters.