Some examples of ocean plants include phytoplankton, algae, seagrasses and kelp. Ocean plants either contain roots or float on the water, and rooted ocean plants only live in shallow water where the roots can reach the soil and the sun can reach the leaves.
Seagrasses are one type of plant found in the ocean. This category contains more than 50 species and is the only one with roots, so seagrasses are usually found in shallower waters. Seagrasses are characterized by flowers and long thin leaves. The plants remain submerged below the surface of the water and grow in beds.
Phytoplankton are another category of aquatic plants. Phytoplankton are considered microalgae because they are single-celled plants. Diatoms and dinoflagellates are also under this category. Dinoflagellates have unique flagella that propel them through the water.
Algae is another major category of ocean plants, which includes seaweed. Algae comes in different shapes, sizes and colors. For instance, red algae can either have a ruffled or broad shape. The plants can grow in filaments or branches. However, all species of red algae need to attach to something in order to survive such as rocks, coral or shells. Kelp is a type of brown algae that grows in large kelp beds or forests.