The polyps of Pseudoplexaura porosa spread out their tentacles to feed on plankton and other fine organic particles both day and night; while the octocoral has symbiotes in the form of single-celled protists that inhabit the tissues.
The polyps spread out their tentacles to feed on plankton and other fine organic particles both day and night. The octocoral has symbionts in the form of single-celled protists called zooxanthellae that inhabit the tissues. 
