User:CharlieJ385/Thalassocalyce

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One species of ctenophores, or comb jellies is known as Thalassocalyce inconstans; the only known species in its family and order. These ctenophores are morphologically distinct from both cydippid and lobate ctenophores. They are a gelatinous species and quite delicate. Sampling is difficult due to their fragility. Using their bell, T. inconstans attract and quickly capture their prey using a mucus-covered membrane.

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Distribution

Many of these ctenophores are commonly found in the top zone of the oxygen minimum layer or the vertical plan with depths up to 350m. Thalassocalyce inconstans are known to be widely distributed including many tropical and temperate regions. Researchers recently discovered this species at Cocos Island, Costa Rica; an island in the Eastern Tropical Pacific. T. inconstans has also been identified off the coast of central Chile using stratified sampling. Other populations have been recorded in regions of the North Atlantic Ocean such as the Sargasso Sea, the Gulf of Mexico, the Mexican Caribbean Sea, and the Mexican Pacific Ocean. Finally, additional research suggests that T. inconstans is an important predator in the open ocean and is also commonly found in the Indian Ocean.

Morphology

Their main distinct feature is the absence of discrete lobes and auricles and pattern of meridional canals. Through the use and movement of the bell, this species is able to consume its prey. This bell is mucus-covered and T. inconstans can close its bell in less than half a second. Their tentacle-like appendages are sticky and used in predatory methods. From the aboral end, this species is often referred to as a "showercap".