Often forms extensive tufts, which may overgrow other species of algae. Red Algae Irish moss Chondrus crispus Red and blue pigments mask green chlorophyll. Photosynthetic pigments give these plants their color. At high tide, air-filled sacs keep blades afloat and close to sunlight. At low tide, blades collapse into a tangled mass.
Slippery mucus keeps it free of plants and animals that usually colonize any available space.
Giant seaweed that grows up to 10 ft. tall in subtidal waters. Broken pieces and chemicals released help turn water brown. Presented by the Indiana Academy Office of Outreach Programs , the UPS Foundation , the National Museum of Natural History , the Natural Partners Program , Ball State University , and Ball State Teachers College .