detailed view halophila johnsonii seagrass featuring small paddle d leaves vibrant green color and delicate

halophila johnsonii seagrass aquatic plant marine vegetation green leaves underwater flora biodiversity coastal ecosystem textures biology floral arrangement isolation nature study life ocean environmental science ecosystems photosynthesis vivid colors ornamental plants habitats landscaping details leaf structure conservation natural beauty ecological importance botanical meadow tropical foliage water algae interaction habitat protection ai generated