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Important in the diverse deep-sea habitats where they live, brittle stars are ecosystem engineers, stirring-up sediment as they dig, recycling nutrients on the seafloor in the process. And they’re important prey of fish and various invertebrates including crabs and sea stars.
BIG NEWS: Nations came together to agree on the first-ever treaty to protect the biodiversity of the high seas.
Rich studies the evolution of echinoderms. The oldest echinoderm fossils date back to the Cambrian period, about 550 million years ago.