Water movements in the pennatulid coelenterate Pteroides griseum

Injections of the canal system of the pennatulid Pteroides griseum (Bohadsch), and the subsequent movements of the dye within the colony, have afforded some information on the direction and relative importance of various water movements in this species. The respiratory role, for example, of these currents is assessed in the light of what is known of the oxygen consumption of Pteroides and the nature and role of water movements in other pennatulids.