tide mark造句怎么写

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.

Draw a sketch map of the bay indicating its landscape, aspect, approximate positions of the high tide mark and low tide mark and position of the transect line.

Of, relating to, or being the region between the high tide mark and the low tide mark.

of or relating to the littoral area above the low-tide mark.