Aquatic creature is a broad term that encompasses many different species of animals. Two of the most common aquatic creatures are FISH and newts. FISH are vertebrates that live in water and breathe through gills. They come in a variety of shapes, sizes, and colors, and can be found in both fresh and saltwater habitats. Newts are amphibians that have smooth, slimy skin and short legs. They are usually found in ponds, streams, and other freshwater habitats.