The Atlantic Blue Tang is a dynamic species that undergoes a complete color transformation, reaching a Max Size of 38 cm. As juveniles, they are a solid, brilliant lemon-yellow. As they mature, they transition into a deep pastel blue-to-purple with fine horizontal lines and a yellow tail, eventually becoming fully blue as adults. They are high-energy swimmers that are found across the Caribbean and Atlantic reefs. They require a large amount of swimming space and a diet rich in a variety of marine-based algae. They can be quite territorial, especially toward other tangs, so they should be housed in a large system with plenty of rockwork.

Feature	Specification
Scientific Name	Acanthurus coeruleus
Max Size	38 cm
Colour	Yellow (Juv) to Royal Blue (Adult).
Shape	High-backed, deep oval.
Location	Atlantic Ocean / Caribbean.
Diet	Herbivore (Algae/Seaweed).
Water Temp	24°C – 27°C.
Temperament	Semi-aggressive to Aggressive.
Aquarium Size	450 – 600 Litres.
Reef Safe?	Yes.

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Atlantic Blue Tang

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