Cardinalfishes or Pterapogon are classified to the family Apogogonidae. Over 200 individual species comprise this genus. Cardinalfishes are endemic to both that Atlantic and Pacific Oceans. These ray finned fish are primarily a marine species. Although they also inhabit brackish water found where bodies of saltwater and freshwater come together.

Cardianlfish can be distinguished by their disproportionately large mouths and the division of their dorsal fins into two different fins.

The Banggai or Pterapogon kauderni is the cardinalfish most commonly raised by home aquarium owners. Banggai cardinalfish is native to the shallow water reef systems found around the twenty-seven island cluster of Banggai Archipelago in Indonesia.

This cardinalfish is relatively small only growing to a total length of approximately four inches. They have a striking color pattern of consisting of three black bars running vertically across the head and body. They have prominent black anterior edges on their anal and second dorsal fin. They also have a white dot patterning that develops during adolescence. Banggais have a maximum life expectancy of five years.

Banggai are an excellent choice for amateur saltwater aquarists. This is an extremely robust and docile creature. They are rated reef safe and can be easily kept with most fish typically found in marine reef aquarium. These fish function better in groups. You should have at least six if you intend to keep them in your aquarium. Avoid mixing them with more aggressive species.

Like many reef fish these fish are hiders and will require plenty of hiding places. They have an especial affinity for live hiding places. Young fish display a preference for sea anemone. Adults and juveniles prefer the company long-spined sea urchins, branching corals, and sea stars.

Banggai are nocturnal. So you will seem them most active in a dimly lit aquarium.

Unfortunately these fish is in such high demand that collecting them for the aquarium industry is threatening them with extinction in the wild. Recent surveys identified a drastic decline in the numbers of two different species from 2001-2004. The population off Limbo Island has been fished into extinction.

Cardinalfish are carnivores. They will eat frozen or dried foods formulated for marine carnivores. You can also feed them as vitamin enriched brine shrimp or finely chopped fresh shrimp or squid from your local grocer.

Fortunately, for their continued long-term survival as a species, this fish is known to breed in captivity. Males and females are similar in coloration. Males can often be distinguished by their larger oral cavities. The male’s jaws will become darker when it enters into its breeding cycle. The females body will become rounder as eggs develop insider her.

Banggai have a tendency to pair up for spawning purposes. Once paired the mating couple will establish a spawning territory away from the main group and will defend it vigorously. You will want to remove the fish to a breeding tank once they start showing signs of pairing. The breeding tank will also require plenty of hiding places.

The female will lay extraordinarily large eggs for a fish of her size. She should be removed from the tank once she gas laid her eggs. Cardinalfish are mouthbrooders. The Benggai male will gather the eggs into the protective cavity of his mouth. He will keep the eggs and fry in his mouth until are fully developed. The developmental period ranges from 20-30 days. The male will not eat until after he releases the fry.

He will be quite hungry by the time the fry are released. You will want to watch the tank carefully and remove the male promptly after release to prevent him from devouring the fry. Fry can be fed newly hatched brine shrimp.