Animalia Biodiversity Taxonomy Demospongiae Porifera Azores introduced native occurrence data uncertain endemism Gulf of Mexico new records Macroalgae Campeche Bank endemic Haplosclerida Arthropoda Chordata Computer science DNA barcode Marine Biology Mexico Yucatan fishes Actinopterygii Coral Hadziidae Mexican Atlantic Perciformes São Miguel Island ecology macroalgae reef species richness Caribbean SEM Serranidae amphipods decapods groundwater isopods mysids sinkholes stygiomysids thermosbaenaceans Yucatan Peninsula cenote description mitochondrial marker morphology sinkhole subterranean COI Ecology Malacostraca Poecilosclerida continental Portugal