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Yellow Boxfish (Ostracion yellow)

Find Yellow Boxfish across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Yellow Boxfish
Photo: Rickard Zerpe · CC BY 2.0
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Where to buy Yellow Boxfish

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

    Search this retailer

    Search Saltwaterfish
  • Amazon

    Search this retailer

    Search Amazon
  • Petco

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    Search Petco

About Yellow Boxfish

Bright yellow coloration with a distinctive cube-like body shape characteristic of boxfish. The body is boxy and angular with a small mouth and eyes positioned high on the head.

Key facts

Care Level
Moderate
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Family
Ostraciidae
Feeding Schedule
2-3 times daily
Difficulty Level
Moderate - Yellow Boxfish requires standard marine aquarium maintenance and intermediate fish keeping skills.
Care Requirements
• 70+ gallon tank minimum (adults need substantial space) • Stable water params: 72-78°F, pH 8.1-8.3, SG 1.020-1.025 • Well-established system with excellent filtration & water quality • Varied diet: meaty foods, quality pellets, occasional vegetable matter • May produce toxic mucus when stressed; maintain calm environment
Min tank size
75 gallons
Appearance
Bright yellow coloration with a distinctive cube-like body shape characteristic of boxfish. The body is boxy and angular with a small mouth and eyes positioned high on the head.
Temperament
Semi Aggressive
Reef safety
Not Reef Safe
Diet
omnivore
Diet Details
Omnivorous, feeding on small crustaceans, copepods, amphipods, and algae. In captivity, provide a varied diet of meaty foods (mysis shrimp, brine shrimp) and vegetable matter (spirulina, nori). Feed small amounts multiple times daily to accommodate their natural grazing behavior.

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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