Common name: Small-Scaled Cardinalfish

Scientific name: Ostorhinchus parvulus (Smith & Radcliffe, 1912)
Red spotted cardinalfish with eggs in mouth, Apogon parvulus, Papua New Guinea, Pacific oceanredspot cardinalfish fish

General information

The Small-Scaled Cardinalfish, Ostorhinchus parvulus, is a lesser-known species in the aquarium trade but is gaining popularity due to its peaceful nature and small size. This species is part of the Apogonidae family, which is known for its nocturnal habits and preference for sheltered reef environments.

Details

Recommended minimum tank volume
40 liter (11 gallons)
Salinity
S.G. 1.022 to 1.025
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8.1 to 8.4
Average size
6 cm (2½″)
Care level
Moderate to easy Prefers dim lighting
Diet
Carnivore Enjoys small meaty foods
Social
Pair Pairs are harmonious
Reefsafe
Yes
Aggression
Peaceful
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perch-like Fishes
    Perciformes
  5. Family
    Cardinalfish
    Apogonidae
  6. Genus
    Cardinalfish
    Ostorhinchus
  7. Species
    Small-Scaled Cardinalfish
    Ostorhinchus parvulus (Smith & Radcliffe, 1912)
  8. Synonyms
    Amia parvula Smith & Radcliffe, 1912
    Apogon parvulus (Smith & Radcliffe, 1912)

Care

Ostorhinchus parvulus is suitable for small to medium-sized aquariums. They prefer a dimly lit tank with plenty of hiding places among live rock or soft corals. These cardinalfish are hardy and can adapt to a variety of aquarium conditions, but they do best in a stable environment with a consistent day-night cycle to mimic their natural habitat.

Reproduction

Like many cardinalfish, Ostorhinchus parvulus is a mouthbrooder. The male will carry the fertilized eggs in his mouth until they hatch, providing protection from predators. This fascinating reproductive behavior can sometimes be observed in the home aquarium if the fish are well cared for and feel secure.

Habitat

The Small-Scaled Cardinalfish is found in the Western Pacific, from the Philippines to northern Australia. They inhabit coral reefs and lagoons, often hiding in crevices or among the branches of soft corals during the day. At night, they emerge to feed on small invertebrates and plankton.