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Red sea fingers is similar in shape to Alcyonium digitatum but is usually blood red or rust coloured. The finger-shaped lobes are slender and can be up to thirty centimetres long. The polyps are white and each one has eight pinnate tentacles which give the colony a feathery appearance when they are extended. [2]
Negombata magnifica, commonly known as toxic finger-sponge, is a species of sponge found from the Red Sea and the Indian Ocean. Its reddish-brown narrow crooked branches can grow up to 70 centimetres (28 in). Negombata magnifica is extremely toxic because of the toxin latrunculin. [1] [2] [3]
Octocorallia (also known as Alcyonaria) is a class of Anthozoa comprising over 3,000 species [1] of marine organisms formed of colonial polyps with 8-fold symmetry. It includes the blue coral, soft corals, sea pens, and gorgonians (sea fans and sea whips) within three orders: Alcyonacea, Helioporacea, and Pennatulacea. [2]
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).
Research has shown that measurements of the gorgonin and calcite within species of gorgonian corals can be useful in paleoclimatology and paleoceanography.Studies of the growth, composition, and structure of the skeleton of certain species of gorgonians, (e.g., Primnoa resedaeformis, and Plexaurella dichotoma) can be highly correlated with seasonal and climatic variation.
The sea fan colony grows up to about 30 cm high, with branches of between 2 and 4 mm. It is bushy with thin cylindrical branches which are often tangled or joined. The polyps emerge from knobs on the surface of the colony. It is variably coloured, with the colony being red, yellow, white or pink, and the individual polyps being white, yellow or ...
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Briareum asbestinum, commonly known as the corky sea finger, is a species of a soft coral in the family Briareidae. [1] It inhabits coral reefs and rocky bottoms in the Caribbean, Bahamas, and Florida, often growing to 30 cm at depths of one to 40 metres.