Threadfin Cardinalfish

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Apogon leptacanthus - (Bleeker, 1856)
Threadfin Cardinalfish

Captive-bred specimens at Oceans Reefs and Aquariums (ORA), Florida. Matthew Wittenrich

[edit] Overview

Only sporadically available to aquarists in the past, this is a great display animal in a shallow- or deep-water reef aquarium and it is now captive bred and easier to find after ORA (Oceans, Reefs and Aquariums) pioneered its culturing.

They are found in dense aggregations in the wild, and shoals of this species can present a flowing, lovely sight in a large reef aquarium. Keep this species in groups of three or more, and offer color-enhancing foods to bring out the iridescent-blue highlights around their eyes and on their fins and flanks.

Family: Apogonidae

Other common name(s):

  • Bluestreak Cardinalfish
  • Blue-streak Cardinalfish
  • Blue-eye Cardinalfish
  • Longspine Cardinalfish
  • Slendertail Cardinalfish

Native range:

Habitat: Found in areas with stony coral growth, rocky hiding places, and near Long-spined Sea Urchins, which they may use as a safe haven. In the aquarium, they need stony corals, caves, and other refuge sites in which to hide.

Maximum length: 6 cm (2 in)

Minimum aquarium size: 76 L (20 gal)

Water: Marine 23 °C (296 K, 73 °F) - 28 °C (301 K, 82 °F)

General swimming level: Mid-level

[edit] Feeding

Carnivore. Feed meaty foods, including marine fish and crustacean flesh, Mysis shrimp, and frozen reef preparations. Color-enhancing rations should be fed several times weekly. Feed once or twice a day.

[edit] Aquarium Compatibility

Mild-mannered and a welcome addition to a docile, fish-only tank or small-polyp stony coral aquarium. Keep in groups of three or more. Larger shoals are more natural.

[edit] Special Care

Wild-caught specimens often do not ship well and fail to survive the transition from reef to aquarium. Look for captive-bred specimens.

[edit] Breeding/Propagation

Mouthbrooder. Being propagated commercially at ORA and successfully by some amateur breeders.

Male mouthbroods the eggs, but larvae are planktonic and very small compared to those of the Banggai Cardinalfish. First foods may be small-strain live rotifers fed on phytoplankton or live copepods. See Wittenrich's The Complete Illustrated Breeder's Guide to Marine Aquarium Fishes.

[edit] Notes

May be picked on by more aggressive cardinalfishes.

Reference: A PocketExpert Guide to Marine Fishes
Image credit: MW
Text credit: SWM
Facts about Threadfin CardinalfishRDF feed
Common name Threadfin Cardinalfish  +, Bluestreak Cardinalfish  +, Blue-streak Cardinalfish  +, Blue-eye Cardinalfish  +, Longspine Cardinalfish  +, and Slendertail Cardinalfish  +
Family Apogonidae  +
Genus Apogon  +
Image credit MW  +
Maximum length 2 in  +
Minimum aquarium size 20 gal  +
Native range Indo-Pacific  +, and Red Sea  +
Reference A PocketExpert Guide to Marine Fishes  +
Specific name leptacanthus  +
Swimming level Mid-level  +
Text credit SWM  +
Water max temp 301 K (28 °C, 82 °F)  +
Water min temp 296 K (23 °C, 73 °F)  +
Water type Marine  +