The littoral zone of a sea is the part of the sea between high and low tide marks . 海的沿岸地带是高潮的测标和低潮的测标之间的海域。
2.
Benthos the organisms that live on the bottom sediments of freshwater and marine ecosystems . they include plants and algae ( phytobenthos ) that grow below low tide mark 底栖生物（海底生物） ：在淡水或海洋生态系统底部生活的生物体。包括一些水底的植物和藻类。
