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Margined Coralfish (Chelmon marginalis)

Find Margined Coralfish 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.

Margined Coralfish
Photo: JSutton93 · CC BY-SA 4.0
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Where to buy Margined Coralfish

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

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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    Search Amazon
  • Petco

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    Search Petco

About Margined Coralfish

The Margined Coralfish is a small, disc-shaped butterflyfish with a predominantly white to pale yellow body. It features bold black or dark brown stripes and margins along the dorsal and anal fins, and a distinctive dark band across the eye. The species has the characteristic compressed body shape typical of the Chaetodontidae family.

Key facts

Common Health Issues
Ich, marine velvet, poor appetite, malnutrition if not fed adequate small foods
Family
Chaetodontidae
Care Level
Moderate
Max Size
5.9
Diet Details
Feeds primarily on small crustaceans, zooplankton, and coral polyps in the wild. In captivity, offer a varied diet of high-quality frozen foods (mysis shrimp, brine shrimp), finely chopped seafood, and quality flake foods. Feed multiple small portions daily.
Temperament
Peaceful
Origin
Indo-Pacific region from Indonesia and the Philippines westward through the Great Barrier Reef to the Indian Ocean.
Care Requirements
• Minimum 75-gallon tank; prefers 100+ gallons for long-term health • Water: 72-78°F, pH 8.1-8.3, SG 1.023-1.025 • Requires excellent water quality with strong filtration and moderate water flow • Varied diet: quality flake, small pellets, frozen mysis shrimp, spirulina • Live rock and coral refuges essential; peaceful reef-safe community dweller
Reef safety
Reef Safe with Caution
Difficulty Level
A moderately challenging species for intermediate aquarists. Chelmon marginalis requires stable water conditions, established live rock, and careful acclimation. It can be sensitive to disease and starvation if not fed appropriate live or meaty foods frequently.
Diet
omnivore
Feeding Schedule
2-3 times daily

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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