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• a  permanently attached to a substrate; not free to move about
  sessile marine animals and plants
• a  attached directly by the base; not having an intervening stalk
  sessile flowers
  the shell of a sessile barnacle is attached directly to a substrate

• sessile fatalists who don't mind and only can talk to themselves.

• stalkless

• vagile
• pedunculate

News & Articles

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• Methane seeps of the deep sea: A bacteria feast for lithodid crabs
  Cold seeps are the basis for a surprising diversity in the desert-like deep sea. Off the coast of Costa Rica, an international team of scientists documented lithodid crabs of the genus Paralomis sp. grazing bacterial mats at a methane seep. The analysis show that not only sessile organisms benefit from the productivity around the cold seeps.
  Oct. 8, 2013 - Science Daily