Blue Tang The blue tang, famously known as "Dory" from the animated film "Finding Nemo," is a striking fish characterized by its bright blue body and yellow tail. Found in coral reefs across the Indo-Pacific region, blue tangs are known for their vibrant color and distinctive shape. They play a vital role in maintaining coral reef health by grazing on algae. Their social behavior, often seen in schools, adds to their charm. Blue tangs are also popular in the aquarium trade, where their stunning appearance captivates fish enthusiasts worldwide.