Sergeant Major Damsel

The Sergeant Major Damselfish (Abudefduf saxatilis) is a vibrant and energetic addition to any saltwater aquarium. Its striking coloration - bright yellow upper body fading into silver-white on the lower half, with five bold vertical black stripes - makes it instantly recognizable and a real eye-catcher in your tank.

Native to the Western Atlantic and Caribbean, Sergeant Majors are hardy and highly adaptable, thriving in a variety of tank conditions. They’re active swimmers and love to explore their surroundings, often staking out a favorite section of rockwork. While generally peaceful in larger tanks, they can become territorial, especially in smaller setups or during breeding periods, so plenty of hiding spots and open swimming areas are recommended.

This species is easy to feed and readily accepts frozen foods like mysis shrimp, brine shrimp, chopped seafood, and high-quality pellets or flakes. Their hardiness, vivid colors, and lively behavior make them an excellent choice for both beginner and experienced marine hobbyists.

Quick Facts:

• Care Level: Easy
• Temperament: Semi-Aggressive / Territorial
• Maximum Size: ~6 inches
• Minimum Tank Size: 50 gallons
• Diet: Omnivore (meaty frozen and prepared foods)
• Reef Safe: Generally, with caution

If you’re looking for a hardy, colorful, and active fish that adds personality and movement to your aquarium, the Sergeant Major Damselfish is a fantastic choice for both reef and fish-only setups.