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The Sergeant Major is a bold, high-energy icon of the Atlantic reefs. Named for its five prominent vertical black bars that resemble the insignia of a military rank, this fish features a shimmering silver-to-white body often topped with a vibrant splash of yellow along the back. In the "Answering Machine" era of saltwater husbandry, the Sergeant Major is legendary for its fearlessness and extreme durability.
This is a fish that refuses to be ignored. It is an active, fast-moving resident that patrols the entire water column with confidence. Whether darting through rockwork or greeting you at the glass during feeding time, the Sergeant Major brings a sense of rugged vitality to larger marine systems. It is the perfect choice for hobbyists seeking a high-visibility, "bulletproof" species that thrives in a wide range of conditions.
Note: Images shown are stock images and not the actual fish you will receive.
Quick Specs
Care Level: Easy
Temperament: Aggressive
Minimum Tank Size: 55 Gallons
Diet: Omnivore
Reef Compatible: Yes (With Caution—may harass smaller residents)
Max Size: 6-7 Inches
Water Conditions: 72-78°F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025
Husbandry Notes The Sergeant Major is exceptionally hardy and adaptable, making it one of the most resilient species in the hobby. They are enthusiastic, aggressive feeders that will readily accept almost any aquarium fare, including frozen mysis, brine shrimp, and high-quality pellets or flakes. Because of their potential size and bold temperament, they should be housed in larger aquariums with semi-aggressive tank mates that can hold their own. Provide plenty of open swimming space and rugged rockwork to accommodate their high activity levels.
Expert Shipping & Logistics We’ve dialed in the logistics for national Overnight Delivery to ensure your livestock arrives in peak condition. Every order is packed using professional-grade insulation and climate-contingent heat or ice packs, designed to maintain stable temperatures throughout the journey. We handle the technical side of the move so you can focus on the acclimation. Our protocol is built on getting these fish from the facility to your tank with zero compromise on health or vitality.
The Sergeant Major is a bold, high-energy icon of the Atlantic reefs. Named for its five prominent vertical black bars that resemble the insignia of a military rank, this fish features a shimmering silver-to-white body often topped with a vibrant splash of yellow along the back. In the "Answering Machine" era of saltwater husbandry, the Sergeant Major is legendary for its fearlessness and extreme durability.
This is a fish that refuses to be ignored. It is an active, fast-moving resident that patrols the entire water column with confidence. Whether darting through rockwork or greeting you at the glass during feeding time, the Sergeant Major brings a sense of rugged vitality to larger marine systems. It is the perfect choice for hobbyists seeking a high-visibility, "bulletproof" species that thrives in a wide range of conditions.
Note: Images shown are stock images and not the actual fish you will receive.
Quick Specs
Care Level: Easy
Temperament: Aggressive
Minimum Tank Size: 55 Gallons
Diet: Omnivore
Reef Compatible: Yes (With Caution—may harass smaller residents)
Max Size: 6-7 Inches
Water Conditions: 72-78°F, dKH 8-12, pH 8.1-8.4, sg 1.020-1.025
Husbandry Notes The Sergeant Major is exceptionally hardy and adaptable, making it one of the most resilient species in the hobby. They are enthusiastic, aggressive feeders that will readily accept almost any aquarium fare, including frozen mysis, brine shrimp, and high-quality pellets or flakes. Because of their potential size and bold temperament, they should be housed in larger aquariums with semi-aggressive tank mates that can hold their own. Provide plenty of open swimming space and rugged rockwork to accommodate their high activity levels.
Expert Shipping & Logistics We’ve dialed in the logistics for national Overnight Delivery to ensure your livestock arrives in peak condition. Every order is packed using professional-grade insulation and climate-contingent heat or ice packs, designed to maintain stable temperatures throughout the journey. We handle the technical side of the move so you can focus on the acclimation. Our protocol is built on getting these fish from the facility to your tank with zero compromise on health or vitality.
