The Yellowtail Blue Damselfish (Chrysiptera parasema), also known as the Yellow Tail Blue Damsel, hails from the Indo-Pacific region, favoring coral-rich habitats and displaying a bright blue body with a neon yellow tail. Reef safe and adaptable to reef aquariums, they thrive in groups of three or more but can become territorial if not introduced last into the tank. With a lifespan of up to five years, they're hardy omnivores, accepting a varied diet. Tank requirements include a minimum size of 20 gallons, stable water parameters, and moderate water flow. A minimum tank size of 20 gallons is suitable for a single Yellowtail Blue Damselfish, and adding 10 gallons for each additional fish is recommended. Stable water parameters, including a pH of 8.1-8.4, salinity between 1.020 and 1.025, and a water temperature of 74°F to 78°F, are crucial. Moderate water flow mimics their natural habitat. Their vibrant coloration intensifies from juvenile to adult stages, making them visually striking additions to well-lit aquariums. Compatible tank mates include Banggai Cardinalfish, Fire Goby, Green Chromis, Yellow Clown Goby, and Royal Gramma. Purchasing from Saltwaterfish.com ensures acclimated and sustainably sourced specimens, contributing to both the aquarium's success and marine ecosystem conservation efforts.