boulders on the seabed and green algae are visible through the crystal clear ocean water.

invertebrate madagascar boulders starfish wildlife crystal seabed nature animal green algae clear ocean water plant long thin legs sand view rock transparent floor shallow water sea starfish boulders stones littoral green seaweed algae stone exotic calm clear baby star life marine little little legs brown legged species creature animal leg thin top view tropical madagascar marine undersea echinodermata asterozoa asteroidea invertebrate wildlife underwater shallow sea sand ocean aquatic