platypus swimming in shallow water

ornithorhynchus conservation environment tranquility underwater freshwater vertebrate endangered amphibian crocodile australia monotreme undefined wildlife tortoise platypus swimming creature anatinus portrait peaceful reptile serpent aquatic bubbles shallow endemic habitat natural looking curious playful biology zoology species animal turtle lizard nature mammal webbed unique laying stream detail serene beauty snake water river mouth brown fauna creek close frog fish beak feet open semi pond lake wild zoo fur egg art