A giant clam along with a myriad of hard and soft corals compete for space on the substrate of Darwin's Wall, Palau, Micronesia, Pacific

giant clam darwin's wall palau coral reef hard corals soft corals substrate marine life underwater biodiversity pacific micronesia ocean habitat sea floor clam habitat coral competition reef ecosystem aquatic environment colorful corals marine ecosystem nature underwater exploration wildlife seascape ocean reef formations invertebrates habitat diversity sea organisms marine biodiversity coral growth clams tropical environment coral diversity underwater world ecosystem dynamics marine organisms coral communities coastal waters underwater ecosystem vibrant corals marine conservation ecological balance clam species natural habitat ecological diversity reef structure thriving corals competitive survival ocean ecology