Darwin was right! The Pacific is shown to be an impassable barrier that has left coral reefs in the east isolated from the rest of the ocean

Naturalist Charles Darwin believed the expanse of open ocean in the Pacific was an'impassable barrier' that separated species living on its east and west coasts. This, he argued, accounted for the differences seen in animals on each side of the ocean in much the same way as a mountain range or a desert may split habitats and lead to different species evolving on either side. Now researchers have proved him correct after showing that coral living in the eastern tropical Pacific are completely isolated from the rest of the ocean. Researchers have simulated how coral larvae spread across the Pacific Ocean using computer simulations. While coral themselves are invertebrates that form large static reefs fixed in place by their hard exoskeletons, they can spread by producing swarms of larvae that can colonise new areas.