アメリカ自然史博物館さんのインスタグラム写真 - (アメリカ自然史博物館Instagram)「Imagine an oyster, but giant… and thorny. Meet the giant thorny oyster (Spondylus varius)! Found in the Indo-Pacific ocean, this large bivalve mollusk can grow up to 7.9 in (20 cm) in size. Like other bivalves, including clams and mussels, it’s a filter feeder that sucks up water and siphons out microorganisms to eat. During this process, oysters remove pollutants from their environment, including excess nitrogen. In fact, oysters are such efficient natural filters that individuals from some species can clean up to 50 gallons of water in a single day! To learn more about the power of oysters, join us at the Museum for EarthFest! Meet team members from The @billionoyster Project, a group dedicated to restoring oyster reefs to New York Harbor. Hands-on activities will include the chance to see one of their oyster tanks! For details, see the link in our bio. Photo: rowanwattpringle, CC BY-NC 4.0, iNaturalist #marinebiology #science #underwater #marineanimals #wildlifephotography」4月21日 1時30分