Invertebrates and vertebrates that spend most of their lives in water are known as aquatic animals. Aquatic larvae are produced by a variety of insects with flying adults, including mosquitoes, mayflies, dragonflies, and caddisflies.
To breathe air or obtain oxygen from water, aquatic species utilize specialized organs called gills, or they can breathe directly through their skin.
Aquatic creatures include fish (Shark), dolphins, and whales.