Squids, octopuses and cuttlefish, such as this Australian Giant Cuttlefish (Sepia apama), compose just one group of animals that call seagrass beds home. Clams and worms bury themselves in the mud or sandy ground. Anemones, sponges, algae and bacteria grow on seagrass blades. Many different fishes hide among the grass, while manatees and green turtles graze. It's estimated that a single square meter of seagrass can contain hundreds of species!