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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 ...
Sepiola atlantica has a latitudinal range from 65ºN to 35ºN, ranging from Iceland, the Faroe Islands and western Norway in the north south to the Moroccan coast. There is a single record of this species from the Mediterranean Sea, a mature male caught in the Tyrrhenian Sea at a depth of 90m. [3]
When disturbed, the squid often pulls its head and arms into the mantle cavity, and folds its fins tightly against the mantle to form a turgid ball. The squid may ink into the mantle cavity, making the ball opaque. This was thought to be an aberrant behavior due to the stress and confinement of shipboard aquaria, until the same inking behavior ...
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.
There is so much to see and learn at this Florida-based laboratory and aquarium. To start, you can see a whole host of magical marine creatures up close and personal, thanks to its 135,000-gallon ...
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 ]
However, the ink is not released, instead it is retained inside the now spherical mantle cavity. The squid thus becomes a completely opaque black ball. [34] The squid retains the shape for about half an hour then its starts to tentatively extend its head and tentacles out of the mantle, followed by the fins and gladius.
The stubby squid is a small species growing to a maximum mantle length of about 5 cm (2.0 in) and a total length of 11 cm (4.3 in), with females being larger than males. The head bears eight short arms, a pair of retractable tentacles and two large eyes. The first pair of arms is shorter than the others and the third pair the longest.