Although some corals are able to catch plankton and small fish using stinging cells on their tentacles, most corals obtain the majority of their energy and nutrients from photosynthetic unicellular dinoflagellates of the genus Symbiodinium that live within their tissues.
ເຖິງແມ່ນວ່າປາບາງຊະນິດສາມາດຈັບປານ້ອຍແລະ plankton ໂດຍໃຊ້ຈຸລັງ stinging ໃນ tentacles ຂອງພວກເຂົາ, ແກນສ່ວນໃຫຍ່ໄດ້ຮັບສ່ວນໃຫຍ່ຂອງພະລັງງານແລະສານອາຫານຂອງພວກມັນຈາກ dinoflagellates unicellular photosynthetic ໃນ genus Symbiodinium ທີ່ອາໃສຢູ່ພາຍໃນແພຈຸລັງຂອງພວກເຂົາ.