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Acropora secale
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Acropora secale : ウィキペディア英語版
Acropora secale

''Acropora secale'' is a species of branching staghorn stony coral. It is found in shallow parts of the Indo-Pacific Ocean and the type locality is Sri Lanka. The oldest fossils found date back to the Pleistocene.
==Description==
''Acropora secale'' is a colonial coral that forms low hummocks. The branches can grow to a diameter of and length of . They are cylindrical but gradually taper towards the tips. They grow in a corymbose fashion with the lower branches being longer than the upper ones so that the coral has a level-topped appearance. The corallites are of varying sizes and arranged in vertical rows, often with alternate rows of larger and smaller corallites. The axial corallites are up to in diameter while the radial corallites either have long tubular openings or nariform (noselike) openings. The skeleton is covered by a thin ectodermal layer of tissue. When feeding, the polyps protrude from the corallites. Each has a single ring of twelve tentacles, one of which is longer than the others. The polyps have a mouth which opens into the coelenteron. This interconnects with other polyps through a complex system of channels, the coenenchyme, inside the porous skeleton.〔 Several colour schemes occur in this coral, purple with yellow tips to the branches, pale brown with blue tips, plain green or plain brown.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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