Preferential Settling of the Sea Anemone Stomphia coccinea on the Mussel Modiolus modiolus.

In resettling after its "swimming" response, Stomphia shows a special behavior pattern when in contact with bivalve shells. Movements of the tentacles, oral disc and column, and huge swellings of the pedal disc are the chief features in a coordinated purposive sequence, which settles the anemone on the shell in a few minutes.