在墨西哥海湾花园堤岸国家海洋保护区，用钢柱支撑着一个气体平台，构成了垂直的镶嵌着管状绵礁的暗礁。
In the Flower Garden Banks National Marine Sanctuary in the Gulf of Mexico, steel pillars supporting a gas platform make a vertical reef encrusted with tube sponges.
黑鳍礁鲨虽然广泛分布于太平洋，但似乎只是生活在其周围很小范围内的暗礁群。
Blacktip reef sharks (Carcharhinus melanopterus), although widespread around the Pacific, appear to have small ranges within their home reef system.
黑鳍礁鲨虽然广泛分布于太平洋，但似乎只是生活在其周围很小范围内的暗礁群。
Blacktip reef sharks (Carcharhinus melanopterus), although widespread around the Pacific, appear to have small ranges within their home reef system.
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