Three Striped Damsel

The Three Stripe Damsel (Dascyllus aruanus) is a hardy and eye-catching saltwater fish known for its bold black-and-white coloration. Featuring three distinct black vertical bands across a bright white body, this species is native to the Indo-Pacific region and is commonly found hovering above branching corals in the wild. Its durability and striking appearance make it a popular choice for marine aquariums, though its territorial nature should be considered when selecting tankmates.

Care Level:

Ease: Beginner-friendly and highly resilient, making it an excellent choice for new saltwater hobbyists.

Water Conditions:

Salinity: 1.020–1.025 specific gravity
pH: 8.1–8.4
Temperature: 74–80°F (23–27°C)

Tank Requirements:

Minimum tank size: 30 gallons
Provide ample live rock structures, caves, and hiding places to establish territories
Open swimming space should be available while maintaining plenty of shelter
Stable water parameters and regular maintenance are essential for long-term health

Temperament:

Behavior: Semi-aggressive to aggressive; territorial, especially as it matures.

Compatibility:

Best suited for tanks with other semi-aggressive fish such as tangs, larger wrasses, hawkfish, and dottybacks
May be kept singly, as a bonded pair, or in larger aquariums with adequate territory
Avoid housing with timid or slow-moving species that may be harassed

Size:

Adult Length: 3–4 inches (8–10 cm)
Growth: Compact but active, requiring sufficient space to establish territory

Reef Compatibility:

Reef-safe – does not harm corals or most invertebrates
Suitable for reef aquariums and fish-only marine systems

Additional Notes:

Three Stripe Damsels are omnivores and readily accept a variety of foods, including high-quality marine flakes, pellets, frozen mysis shrimp, brine shrimp, and other meaty marine preparations. Their exceptional hardiness makes them one of the most durable marine fish available. While easy to care for, they can become increasingly territorial with age, so tankmate selection should be planned accordingly. With proper care, they can live 5–10 years or longer, providing years of activity and striking contrast in the aquarium.