Colochirus quadrangularis Troschel, 1846
Thorny sea cucumber
Thorny sea cucumber,  方柱翼手參
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Family:  Cucumariidae ()
Max. size: 
Environment:  benthic; marine; depth range 0 - 115 m
Distribution:  Indo-West Pacific.
Diagnosis:  Body can be squarish or rectangular in shape. With rows of prominent tapering papillae along the corners of the body. Body is grayish-red, while the underside and papillae are usually red. Feeding tentacles have yellow stalks and dark red branches. Tube feet are light red.
Biology:  Intertidal, to depths reaching 100 meters. Attached on rocks or laying in sandy areas and seagrass patches. Suspension feeder. Collect planktons and organic detritus via its feeding tentacles (Ref. 125532).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:  An indicator species in coral reefs (Ref. 125532). C: Refs. 125532.

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