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Threadfin Cardinalfish (Apogon leptacanthus)

Find Threadfin 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.

Threadfin Cardinalfish
Photo: Georges Jansoone (JoJan) · CC BY 3.0
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Where to buy Threadfin 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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    Search Amazon
  • Petco

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    Search Petco

About Threadfin Cardinalfish

A small, slender cardinalfish with a reddish or pale tan coloration on the body and distinctive thread-like pelvic fins that extend well beyond the body. The dorsal and anal fins are elongated, and the fish has a somewhat translucent appearance with minimal markings.

Key facts

Appearance
A small, slender cardinalfish with a reddish or pale tan coloration on the body and distinctive thread-like pelvic fins that extend well beyond the body. The dorsal and anal fins are elongated, and the fish has a somewhat translucent appearance with minimal markings.
Common Health Issues
Parasitic infections, bacterial infections, starvation if not acclimated to prepared foods
Diet Details
Feeds on small crustaceans and zooplankton in the wild. In captivity, offer frozen mysis shrimp, copepods, and small live prey like brine shrimp. Feed 2-3 times daily with small portions.
Origin
Indo-Pacific region from the Red Sea and East Africa to the western Pacific, including the Philippines, Indonesia, and Great Barrier Reef areas.
Reef safety
Reef Safe
Temperament
Peaceful
Min tank size
30 gallons
Difficulty Level
Moderate difficulty. Threadfin Cardinalfish are hardy once established, but they are nocturnal and slow feeders that require careful acclimation and patience to transition to prepared foods. They need adequate shelter and non-aggressive tankmates.
Care Level
Moderate
Family
Apogonidae
Water Parameters
Temperature: 72-80°F pH: 8.1-8.3 Salinity: 1.02-1.025
Diet
carnivore

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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