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Mantle (mollusc) European squid (Loligo vulgaris). The mantle is all that is visible behind the head: the outer body wall and the fins are all part of the mantle. The brightly coloured mantle of a giant clam protects it from bright sunlight. The cuttlefish uses its mantle cavity for jet propulsion. The mantle (also known by the Latin word ...
Cuttlefish have eight arms and two additional elongated tentacles that are used to grasp prey. The elongated tentacles and mantle cavity serve as defense mechanisms; when approached by a predator, the cuttlefish can suck water into its mantle cavity and spread its arms in order to appear larger than normal. [27]
Once a male is successful in attracting a mate, the male will insert the hectocotylus into the female’s mantle cavity to fertilize the female. The female will then lay her eggs nearby. All cuttlefish, including S. mestus, disperse their eggs by attachment to the sea floor, usually on or under hard surfaces such as rock and coral.
Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks[a] (/ ˈmɒləsks /). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. [4] The number of additional fossil species is estimated between 60,000 and 100,000, [5] and the ...
Within the mantle cavity is where fertilization typically occurs. [5] Sepia lycidas lay amber colored eggs shortly after fertilization takes place, that are similar in shape to hen eggs. [4] Finally, this cuttlefish species has been observed displaying many complex reproductive behaviors, such as courtship, mating, males competing for mates ...
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. In most cephalopods, such as octopus , squid , and cuttlefish , the hyponome is a muscular tube.
When the mantle contracts, water is forced through the gills, which lie between the mantle cavity and the funnel. The water's expulsion through the funnel can be used to power jet propulsion. If respiration is used concurrently with jet propulsion, large losses in speed or oxygen generation can be expected. [58] [59] The gills, which are much ...
The cuttlebone of a cuttlefish. This is the largest hard part of a cuttlefish, maintaining the rigidity of its body.. The common cuttlefish is one of the largest species of cuttlefish with a mantle length reaching up to 45 cm and a mass of 4 kg on a presumed male, although this is for an exceptional specimen in temperate waters; specimens in subtropical waters rarely surpass a mantle length of ...