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in the united states, trawling is prohibited off south-east alaska (134,700 km2 closure) to protect red tree corals, and in other areas off alaska (129,500 km2 closure) to protect sensitive benthic habitats, including emergent epifauna such as bryozoans and sponges, used by crabs and other species.
美国阿拉斯加东南部沿海（134 700平方公里禁区）禁止拖网，以保护红珊瑚；在阿拉斯加岸外其他地区（129 500平方公里禁区）也禁止拖网，保护敏感的底栖生境，包括螃蟹和其他鱼种利用的藓苔虫和海绵等新生底上动物。