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Crisp pillow coral
The crisp pillow coral (''Anomastraea irregularis'') is a species of coral in the monotypic genus ''Anomastraea''.〔〔(【引用サイトリンク】url=http://www.arkive.org/crisp-pillow-coral/anomastraea-irregularis/ )〕
==Description==
The crisp pillow coral forms small, mound-like colonies that grow to be about 20 cm in height and make a blue-grey and cream color.〔(【引用サイトリンク】url=http://www.arkive.org/crisp-pillow-coral/anomastraea-irregularis/ )〕 Like other corals that form colonies, it consists of soft, little polyps that are assisted with small tentacles that guide food in the water to the coral's mouth. The polyps discharge a skeleton known as corallite which would participate in the formation of coral reefs. The corallites establish an uneven honey-comb pattern.〔(【引用サイトリンク】url=http://www.arkive.org/crisp-pillow-coral/anomastraea-irregularis/ )〕
As a member of the Siderastreidae family, it is a zooxanthellate, living in harmony with zooxanthellae, a unicellular algae, which aids the coral in its growth and survival. The coral protects the algae with its tissue as the algae helps the host with energy and nutrients, as well as removing metabolic waste. However, the crisp pillow coral is restricted to staying in shallow waters where the zooxanthellae can execute photosynthesis.〔(【引用サイトリンク】url=http://www.arkive.org/crisp-pillow-coral/anomastraea-irregularis/ ).〕
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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