Blue Tang / Regal Tang

Common name: Blue Tang, Regal Tang
Scientific name: Paracanthurus hepatus
Origin: Indo-Pacific
Adult size: up to 25–30 cm
Temperament: Semi-aggressive
Reef safe: Yes (with caution)
Minimum tank size: 400–500 L recommended

Overview

The Blue Tang is one of the most iconic reef fish, known for its vivid blue body and contrasting black pattern with a bright yellow tail. An active open-water swimmer, it requires substantial space and strong water movement.

Behavior & Compatibility

• Constant swimmer – needs open space
• Can be territorial toward other tangs
• Generally peaceful with non-similar species
• May show stress if kept in undersized aquariums

Best kept as a single specimen unless housed in very large systems.

Care Requirements

• Large, mature aquarium
• Strong water circulation
• Excellent filtration and stable parameters
• Plenty of swimming space with structured rockwork

Sensitive to poor water quality and prone to marine ich if stressed.

Feeding

Primarily herbivorous:
• Marine algae and nori
• Spirulina-based foods
• High-quality pellets
• Occasional frozen foods

Frequent feeding helps maintain immune health and coloration.

Notes

A stunning but demanding species suited for experienced reef aquarists with large systems. Not recommended for small aquariums despite its popularity.

An impressive centerpiece fish when kept in proper conditions.