Who controls whom: Algae or sea anemone?
(PHYSorg.com Biology)

Bleached anemones-those lacking symbiotic algae-do not move toward light, a behavior exhibited by healthy, symbiotic anemones. Published in Coral Reefs, this finding from Carnegie`s Shawna Foo, Arthur Grossman, and Ken Caldeira, along with Lauren Liddell of the NASA Ames Research Center, is a fascinating case study for exploring the concept of control in a symbiotic relationship.