The Emperor Angelfish is a stunning addition to any aquarium with its vibrant blue and yellow stripes. This fish is generally peaceful but may become territorial as it matures. It thrives on a diet of spirulina, algae, and meaty foods. Growing up to 15 inches in length, it requires a tank size of at least 200 gallons with plenty of hiding places. Compatible tank mates include other angelfish, tangs, and wrasses.