Algae are the simplest plants found predominantly in water. They are divided based largely on the pigments they contain and hence, their colour. While all divisions of algae have chlorophyll A, they differ in other chlorophyll molecules, as well as other accessory pigments which imparts them a characteristic range of colours. Some are red, blue and some have a mixture of colours. Algae are mostly found in wet areas and underwater such as near waterfalls, oceans, lake areas, in underwater ecosystem Algae play a very important role by working as producers. Creatures like fishes mainly live on this algae. Algae are now used even as human food too, and are used to make fuels like algal fuels. Though algae are small and not taken seriously like other organisms, they are maintaining the ecological balance silently.