The document summarizes the taxonomic classification of organisms found in marine ecosystems, with a focus on the coral reef. It describes the eight major groups of photosynthetic eukaryotes in marine and freshwater systems. It also outlines the five eukaryotic kingdoms that make up macroscopic marine life, including animals, plants, and algae. Finally, it provides details on seven major animal phyla found in coral reefs and nearby habitats, and guidelines for an upcoming student presentation and quiz on the classification of local invertebrate and fish species.