Pilot Fish / Golden Trevally

About this fish

Pilot Fish / Golden Trevally is a marine fish sold under the name Golden Trevally, with the scientific name Gnathanodon speciosus. In an aquarium, it’s primarily a high-activity, predatory fish that’s best used as a showpiece for experienced keepers who can provide a spacious, secure system and a steady supply of meaty foods. Because it can be quite active and can outcompete or harass smaller tankmates, it’s commonly kept with robust, appropriately sized companions or in a species-forward setup.

Features:

• Predatory, carnivorous feeding response—typically requires a diet of meaty foods rather than flakes or algae-based foods
• Naturally active swimmer that benefits from a larger footprint and ample open water for movement
• Secure, escape-resistant housing is important, as strong swimmers can attempt to breach tank openings
• Often best suited to larger aquariums with appropriately sized tankmates to reduce stress and feeding competition
• Requires stable marine water conditions; consistent salinity and chemical parameters help support long-term health
• Generally does not pair well with small, delicate invertebrates or tiny fish that may be treated as food
• Helpful to provide hiding/structure for adjustment after introduction while still allowing open swimming space

Specifications:

• Scientific name: Gnathanodon speciosus
• Care level: Intermediate to advanced (due to predatory feeding and space needs)
• Temperament: Predatory; can be aggressive toward smaller tankmates
• Water type: Marine
• Temperature: ~24–27°C (75–81°F)
• Salinity (specific gravity): ~1.020–1.026
• pH: ~8.1–8.4
• Adult size (typical): Often grows large for home aquariums
• Diet: Carnivorous; meaty foods (e.g., frozen/thawed seafood and other meaty preparations)
• Lighting: Not a primary requirement; normal aquarium lighting is typically sufficient
• Water flow: Moderate, stable circulation (avoid overly stagnant conditions)