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Ring-Tailed Cardinalfish (Apogon aureus)

Find Ring-Tailed Cardinalfish 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.

Ring-Tailed Cardinalfish
Photo: Bernard DUPONT from FRANCE · CC BY-SA 2.0
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Where to buy Ring-Tailed Cardinalfish

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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  • Petco

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About Ring-Tailed Cardinalfish

A small, stocky cardinalfish with a reddish or orange-red body. The most distinctive feature is a prominent white or pale ring-like band around the caudal peduncle (tail base), giving the species its common name. The fish has a rounded head, large eyes typical of nocturnal species, and a compressed body shape characteristic of the Apogonidae family.

Key facts

Max Size
3.5
Feeding Schedule
1-2 times daily
Appearance
A small, stocky cardinalfish with a reddish or orange-red body. The most distinctive feature is a prominent white or pale ring-like band around the caudal peduncle (tail base), giving the species its common name. The fish has a rounded head, large eyes typical of nocturnal species, and a compressed body shape characteristic of the Apogonidae family.
Min tank size
20 gallons
Aka
Ringtail Cardinalfish, Ringtailed Cardinalfish
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Family
Apogonidae
Origin
Indo-Pacific region from Indonesia and Philippines to Australia and the Great Barrier Reef. Found in shallow to moderate depths on coral and rocky reefs.
Common Health Issues
Starvation if not fed small prey regularly, parasitic infections, bacterial infections if water quality declines
Diet
carnivore
Care Level
Easy
Care Requirements
• Minimum 20 gallon tank; larger tanks preferred for groups • Nocturnal species; provide dim lighting and caves/shelters for daytime refuge • Temperature range 72–78°F, pH 8.1–8.3, salinity 1.023–1.025 • Feed live or frozen small prey (copepods, mysis shrimp, small fish larvae) 1–2 times daily • Generally peaceful but may eat very small fish or shrimp; otherwise safe with most reef-safe tankmates

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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