Tank Size: 250+ gallons (950+ liters) due to its large size and active swimming needs.
Water Parameters:
- Temperature: 74–82°F (23–28°C)
- pH: 8.1–8.4
- Salinity: 1.020–1.025
- Water Flow: Moderate to strong (prefers well-oxygenated water).

Semi-aggressive, but generally less territorial than other large tangs like the Clown Tang.
Best kept alone or with non-aggressive tank mates in a very large tank.
Compatible with:
- Large, active fish such as triggers, angelfish, wrasses, and groupers.
- Can cohabitate with other tangs in tanks over 500+ gallons, but avoid other Acanthurus species.
- Reef-safe—does not eat corals but may disturb invertebrates while foraging.

Herbivorous, requiring a plant-heavy diet.
Feed multiple times daily with:
- Dried or fresh seaweed (nori)
- Spirulina-based flakes and pellets
- Vegetable-based frozen foods
- Occasionally accepts mysis shrimp and brine shrimp, but plant matter should dominate.

Needs an extremely large aquarium with plenty of open swimming space.
Prone to marine ich and lateral line erosion—quarantine before adding to the display tank and maintain a vitamin-enriched diet.
Strong water flow and high oxygen levels are necessary for this species.
Best suited for expert aquarists or public aquariums due to its large size and swimming needs.

Gold Tail Cromis

Description