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Uploaded on Jan 24, 2010
'Corynactis viridis' (Natural History Episode 6)
In this video a single Corynactis viridis corallimorph polyp (about 8mm in diameter) is seen capturing and digesting tiny plankton as they flow past in the current. As the tentacles capture food, they retract towards the animal's mouth, located at the center of the polyp. The mouth is likewise transformable; capable of extending, expanding, and enveloping food items. The total elapsed time was roughly 12 minutes and sped up 1200% in order to demonstrate the hydraulic muscular contractions and contortions that the polyp goes through while feeding. 470nm LED light is used to highlight the fluorescent orange ring around the outer diameter of the polyp.
Video, Aquarium + Original Soundtrack: Coral Morphologic 2010