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Documented as a species often associated with coral reefs [7] and rocky ledges, P. crucifer is able to withdraw into crevices and holes if agitated. [ 6 ] The reproductive cycle in this species has been observed to be prolonged (longer than annual or biannual), suggesting differences between the reproductive cycles of tropical sea anemones and ...
The base of the polyp secretes the stony material from which the coral skeleton is formed. The body wall of the polyp consists of mesoglea sandwiched between two layers of epidermis. The mouth is at the centre of the oral disc and leads into a tubular pharynx which descends for some distance into the body before opening into the gastrovascular ...
Diagram showing a coral polyp, its corallite, coenosarc and coenosteum Up : zoom on the skeletal cup of an Astrangia coral; Down : view of the skeleton of the whole colony, showing all the coralittes. A corallite is the skeletal cup, formed by an individual stony coral polyp, in which the polyp sits and into which it
Deep-water coral Paragorgia arborea and a Coryphaenoides fish at a depth of 1,255 m (4,117 ft) on the Davidson Seamount. The habitat of deep-water corals, also known as cold-water corals, extends to deeper, darker parts of the oceans than tropical corals, ranging from near the surface to the abyss, beyond 2,000 metres (6,600 ft) where water temperatures may be as cold as 4 °C (39 °F).
Consequently, the term "gorgonian coral" is commonly handed to multiple species in the order Alcyonacea that produce a mineralized skeletal axis (or axial-like layer) composed of calcite and the proteinaceous material gorgonin only and corresponds to only one of several families within the formally accepted taxon Gorgoniidae (Scleractinia).
This consists of a tubular column topped by a flattened area, the oral disc, with a central mouth; a whorl of tentacles surrounds the mouth. In solitary individuals, the base of the polyp is the foot or pedal disc, which adheres to the substrate, while in colonial polyps, the base links to other polyps in the colony. [2] Anatomy of a stony ...
Several species of coral-inhabiting barnacles are associated with Astreopora. In fact, Hiroa stubbingsi and two species of Cionophorus seem to occur nowhere else. In the case of H. stubbingsi , which has a primitive wall and a relatively unspecialised operculum , this may be because it is not equipped to occupy other corals, but the Cionophorus ...
Gorgonia mariae, commonly known as the wide-mesh sea fan, is a species of sea fan, a sessile colonial soft coral in the family Gorgoniidae. It occurs in the tropical western Atlantic Ocean and the Caribbean Sea at depths down to about 50 m (160 ft).
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