Scientific name: Paracanthurus hepatus Origin: Tropical Indo-west Pacific Maximum size: Around 30cm, but 15cm is more common Cost: £18-40
The iconic Regal tang is often encountered by aquarists when it’s very small – 1-2cm is not unheard of. Remarkably, given suitably benign tankmates, even such modestly sized specimens can thrive.
Regal tangs have a reputation for being nervous fish, wedging themselves in aquarium decor at the first sign of trouble. This mirrors their natural behaviour, where coral heads and reef crevices are their refuges. Given time, most will settle and become confident – and develop enormous appetites.