coral anatomy. cross section and structure of a polyp

coral anatomy polyp cross structure digestive cavity mouth tentacles closeup epithelium zooxanthellae stinging cell nematocyst isometric flat vector poster skeleton calcium carbonate cnidocytes symbiotic algae epidermis septum septa colonial budding anemone caco3 cnidocyst cnida animal bio biology blue cutaway diagram education fauna marine nature ocean protozoa reef scheme science sea tropical underwater water corallites anthozoa limestone cells zooplankton medusa jellyfishlike close-up brand text font advertising presentation cartoon line design document circle logo screenshot pattern drawing banner organ label