The blue tang fish, also known as Paracanthurus hepatus, is a vibrant marine species found in the warm waters of the Pacific and Indian Oceans. It is easily recognizable by its bright blue body and yellow tail, making it a popular choice for aquariums. Blue tangs are herbivores, primarily feeding on algae and plant matter. These fish typically inhabit coral reefs and rocky areas, where they play a crucial role in maintaining the health of their ecosystem. Blue tangs can grow up to 12 inches in length and are known for their unique ability to change color when stressed.