18 Jul 2015

An anemone in action.

Actinea equina with its tentacles out in a shallow rockpool. Anything edible brushing against the tentacles will be harpooned by nematocysts; bottle-shaped cells that contain a barbed spear which shoots into the prey, the nematocyst then contracts and forces venom into the prey, which the inner ring of tentacles then pulls into the mouth.

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