Marine plant

Marine plants are plants that live on or near the ocean.

Algae

 * For more information, see Algae

Microscopic photosynthetic algae contribute a larger proportion of the world's photosynthetic output than all the terrestrial forests in the world combined. Among all of the plants in the ocean, algae is one of the most abundant. Brown algae, a group formerly considered as plants, such as Sargassum and kelp can commonly form kelp forests.

Seagrass

 * For more information, see Seagrass.

Seagrass grows in the ocean in fully-saline, shallow environments. They often provide hiding or feeding places for fish and invertabrates, such as the white-spotted puffer.

Marine plants on the surface
The foreshore and seashore of the ocean provide a habitat for some marine plants, including mangroves, cordgrass, and beachgrass.