Polymastia invaginata

Polymastia invaginata Kirkpatrick, 1907

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Family:	Polymastiidae ()
Max. size:
Environment:	sessile; marine; depth range 18 - 1226 m
Distribution:	Southern Ocean and the Antarctic: Antarctica, Kerguelen Island, and Terre Adélie.
Diagnosis:	Greenish gray to yellow. Hemispherical and bristly, with until 2 large conical papillae that contracts when disturbed. Up to 11 cm in diameter (Ref. 089939).
Biology:	Common on cliffs and hard surfaces. Also settles on small stones then extend out onto to the mud. Apparently able to remove sediment build-up by contraction and relaxation. Suspension feeder; preyed upon by starfishes. Larvae disperse by crawling (Ref. 089939).
IUCN Red List Status:	Not Evaluated (N.E.) Ref. 123251)
Threat to humans:	harmless
Country info:

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