Threadfin cardinalfish – Apogon leptacanthus
Species name: Apogon leptacanthus
Common names: Threadfin cardinalfish, Longspine Cardinalfish, Bluestreak Cardinalfish, Slendertail Cardinalfish
Family: Apogonidae (Cardinalfishes)
Order: Perciformes (Perch-likes)
Class: Actinopterygii (Ray-finned Fishes)
Maximum length: 2.5 in.
Minimum tank size: 30 gallons
Aggressiveness: Peacefull. Can be kept in groups of at least 5. As a group they will establish their hierarchy relatively peacefully.
Reef Compatibility: Excellent
Distribution: Western and Eastern Indian Ocean, Northwest, Western Central and Eastern Central Pacific
Diet: Carnivore. Requires a diet of meaty foods such as live or frozen brine shrimp, marine flesh, plankton, mysis shrimp, bloodworms, flake. If your Threadfin cardinalfish appears to not eat, try feeding after the aquarium lights turn off.
In the wild, the Threadfin cardinalfish inhabit the Indo-Pacific where it forms dense aggregations, even with fish of different species, above branching corals in sheltered bays and lagoons at depth of 0 to 22 feet. This species is mostly nocturnal.
The Threadfin Cardinalfish has a long slender shape and a transparent body with blue and orange vertical markings on the head and front of body. In juveniles the blue lines are missing. The eyes are outlined in iridescent blue like the markings on both the fins and body. It is difficult to tell male from female unless the male is holding fry in its mouth. Cardinalfish are mouth brooders and for several weeks a male cardinal will not eat while it is carrying babies.
It should be kept in groups of at least a five individuals and should be kept only with peaceful tankmates. As a group, they will establish a strict hierarchy without aggressiveness. The ideal aquarium should have plenty of hiding places to hide during the day. They will learn to adjust to the brighter lit aquarium in time. Reef aquariums are ideal. It likes to hide in sea grass like caulerpa sp. when available.
The specific gravity should be between 1,020 and 1,025, the temperature between 73.4°F and 78.8°F. The pH level should vary between 8.0 and 8.3.
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Article written by www.aquariumslife.com
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