Triggers & Puffers
Yellow Boxfish
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Live animal: Overnight delivery, Tuesday–Friday (Saturday $25 extra, arranged by phone or email). Covered by our Live Arrival Guarantee.We ship daily. Prices and availability may change. Images are for illustration only and may vary from the actual product. Stock is subject to change.
- Packed to order with heat or cold packs for the season
- Eating and settled in our systems before it ships
- Questions? Ask a reef keeper
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About this fish
About this fish
Yellow Boxfish is an uncommon reef fish for the home saltwater aquarium, sold as Ostracion cubicus. It’s prized for its unusual body shape and makes a standout, active display animal in properly set up tanks. In practical terms, it’s best for aquarists who can provide a mature, stable environment and carefully chosen, non-aggressive tankmates—and who are comfortable preparing a consistent meaty frozen diet.
Features:
- Distinctive, boxy appearance that makes it a conversation-starting centerpiece fish.
- Requires a large, stable tank; changes in conditions and stress should be minimized.
- Often kept with calm tankmates, as aggression can contribute to stress.
- Can release a toxin into the water if stressed or dying, so tankmates and handling matter.
- A varied diet of quality frozen foods is generally recommended for long-term health.
- Best added to a mature, stable system, with slow acclimation to reduce shock.
- Provide a quiet spot in the tank so the fish can settle after arrival.
Specifications:
- Species: Ostracion cubicus (Yellow Boxfish)
- Care level (general): Advanced; sensitive to stress
- Temperament: Can be stressed by aggressive tankmates; choose calm companions
- Diet (general): Varied, quality frozen foods
- Tank requirements (general): Large, stable saltwater aquarium; mature, stable system
- Setup notes: Slow acclimation; offer a quiet settling area
- Common size options: Small, Med, Medium-Large, Large (exact dimensions vary by stock)
