Life of Sea | Banggai Cardinalfish | The cardinalfish Banggai (Pterapogon kauderni) is a small tropical cardinalfish (family Apogonidae). These fish attract popular in the aquarium trade. This is one of the relatively few fish have been bred in captivity regularly, but a significant number are still caught in the wild and is now an endangered species, the species is restricted to the islands Banggai Indonesia. This species has a very limited geographic range (5,500 km ²) and the small size of the total population (estimated 2.4 million).
The Banggaicardinalfish consists of isolated populations are concentrated around the shallows of 17 small islands and large 10 in Banggai Islands. A small population also occurs from Central Sulawesi, in Luwuk port. One additional populations have become established in the Lembeh Strait (North Sulawesi), 400 km north of the natural area of distribution of the species, followed by the introduction of aquarium fish traders in 2000.
This species grows up to 8 cm (3 inches) in total length. It has a distinctive contrasting pattern of black and light bars with white spots. This species is easily distinguished from all other cardinalfish tasseled first dorsal fin, anal fin ray elongated and two backs, forked tail fin, and a color pattern consisting of three black bars on the head and body and a prominent black anterior edge of the anal and dorsal fins second. Males can be distinguished from females with enlarged oral cavity flashy, obvious only when they reflect.
The Banggai cardinalfish is the only representative of the family are diurnal. It is a tropical demersal fish that form a stable group of about 9 people in shallow water, most commonly at a depth of 1.5 to 2.5 m. This species inhabits a variety of shallow habitats, including coral reefs, seagrass beds, and open areas of sand and debris. It is most common in quiet habitats protected side of the larger islands. It is often found associated with seagrass Enhalus Enhallus and long-spined sea urchin Diadema setosum. This happens between different benthic substrates life like sea urchins, sea anemones, and branching, young fish are most commonly associated with sea anemones, while adolescents and adults occur most often among long-spined sea urchin and branching, as well as marine star, hydrozoans, and mangrove prop roots.
Individuals from 2 to 60 was hovering just above the sea urchin, with the younger about 2-3 cm SL staying close to the hedgehog. Fish retreat among the spines when threatened. The exhibition is well defined individual fish homing behavior and return to the original location of their group when disturbed. Banggai cardinalfish often coexist with shrimp and anemone anemonefish range while sheltering in anemones and corals, as found in the sea urchin spines, was associated with several other genera cardinalfish. After the removal of fish by aquarium collectors, the abundance of invertebrates have been shown to decrease associated