The islands consist of oyster reefs covered with a thin veneer of black mud.

由牡蛎礁构成的小岛上覆盖着一层薄薄的黑色软泥。

It is practically significant to discuss the mode of the community environmental education in the Xiaomiaohong oyster reefs reservation in Dongzaogang town of Haimen city in Jiangsu Coast.

本论文为使研究更具有实践意义，对江苏海门市东灶港牡蛎礁保护区的社区环境教育模式进行了探讨。

A survey of oyster habitats around the world has found that the succulent mollusks are disappearing fast and 85 percent of their reefs have been lost due to disease and over-harvesting.

在世界范围内牡蛎栖息地的调查中，这种多肉多汁的软体类动物正以飞速消亡，与此同时由于病害与过量的捕捉85%的(牡蛎所赖以栖息的)群礁也在消亡。

The strategy also calls for, among other things, more monitoring of gulf species, the restoration of oyster and coral reefs and a reduction in emissions from oceangoing vessels.

在众多事宜中，这份方案也号召对海湾生物，牡蛎和珊瑚礁的恢复，以及海上行驶船舰排放物减少的更多监控。