Genetic markers, Eukaryotes, Analysis, DNA barcoding, Genetic aspects, Methods, Biological diversity, Coral reefs, Marine ecology, Taxonomy, Ecosystems, Cytochrome-c oxidase, Sediments, Biodiversity, Seaweeds, National parks, Case studies, Mitochondria, Databases, Plankton, Primers, DNA, Morphology, Bayesian analysis, rRNA 18S, Deoxyribonucleic acid--DNA, Pa...