Underwater plants are an important part of aquatic ecosystems. Two examples of underwater plants are SEAWEED and eelgrass. SEAWEED is a type of algae that grows in shallow, coastal waters and can be found in a variety of shapes and colors. Eelgrass is a flowering plant that grows in shallow, brackish water and provides food and shelter for many species of fish and other marine life. Both SEAWEED and eelgrass play an important role in maintaining the health of aquatic ecosystems.