Sohal Surgeonfish Care Guide | Diet, Behavior & Tank Requirements

Acanthurus sohal is a stunning, highly territorial marine fish native to the Red Sea and western Indian Ocean. Known for its bold stripes and aggressive behavior, it’s a favorite among experienced saltwater aquarists.

Natural Habitat

• Native Range: Northwestern Indian Ocean — especially the Red Sea, Gulf of Aden, and Persian Gulf
• Environment: Outer edges of fringing coral reefs exposed to wave action
• Depth Range: Typically found from 1 to 20 meters (3 to 66 feet)

 Diet

• Primary Diet: Herbivorous — feeds mainly on filamentous and macroalgae
• In Captivity: Requires a varied diet including:
  • Dried seaweed (nori)
  • Spirulina-based flakes and pellets
  • Occasional meaty foods like mysis shrimp for variety
• Feeding Frequency: 3–4 times daily to support high activity levels

 Behavior and Temperament

• Territorial: Extremely aggressive, especially toward other tangs or similar-shaped fish
• Best Kept: As a single specimen unless in a very large tank
• Activity: Active swimmer; needs ample space and strong water flow
• Defensive Adaptation: Possesses a sharp, scalpel-like spine at the base of the tail, used for defense

Reproduction

• Spawning: Oviparous; external fertilization in open water
• Captive Breeding: Rare and not commonly achieved in home aquariums

Water Requirements for Sohal Surgeonfish