Description
Scientific Name: Apogon leptacanthus
Common Names: Threadfin Cardinalfish, Glass Cardinalfish, Longspine Cardinalfish, Blue Eye Cardinal
Maximum Length: 2.5 inches
Minimum Aquarium Size: 20 gallons
Aquarium Suitability: Hardy, generally durable
Diet: Carnivorous; requires a diet of meaty foods like frozen mysis shrimp, brine shrimp, and chopped seafood. May accept high-quality flakes or pellets once acclimated.
Reef Safe: Yes
Temperament: Peaceful and social; thrives in schools of 3 or more. Best housed with calm, non-aggressive tankmates to avoid stress.
Captive Care: The Apogon leptacanthus, or Longspine Cardinalfish, is a beautiful and peaceful species ideal for the experienced aquarium hobbyist. Known for its striking appearance and calm demeanor, this species makes an excellent addition to a well-maintained reef tank. Provide plenty of live rock and hiding spots for security, as they are nocturnal and shy during the day. The Orange vertical stripes on the fish make it stick out among Cardinalfish. These guys are cool!! Introduce groups simultaneously to encourage schooling behavior.
Fun Facts
- Transparent Beauty: Apogon leptacanthus has a nearly see-through body with iridescent blue lines and orange accents, making it a subtle yet striking addition to dimly lit tanks.
- Mouthbrooder Extraordinaire: Males incubate eggs in their mouths, but low oxygen levels can stress them, leading to early release of the brood—highlighting the need for well-aerated aquariums.
- Night Owls: Primarily nocturnal, they hide during the day and emerge at night to forage, adding dynamic activity to evening viewing.
- Schooling Spectacle: In the wild across the Indo-Pacific, they form large schools in lagoons and reefs, mimicking this in captivity enhances their natural behavior and reduces shyness.
