Common name: Blackfin Dartfish

General information

The Blackfin Dartfish, Rhabdamia nigrimentum, is a small and peaceful marine fish that is a member of the family Apogonidae. It is known for its elongated body and striking coloration, with a pale body contrasted by black fins and a black mark on the caudal peduncle. This species is not as common in the aquarium trade as some other dartfish, but it can be a unique and attractive addition to a peaceful community tank.

Care

Blackfin Dartfish are best kept in an aquarium with plenty of hiding places and a sandy substrate to mimic their natural environment. They are jumpers, so a well-fitted lid is essential to prevent escape. These fish are generally peaceful and can be kept with other non-aggressive species. They do well in small groups or pairs and should be provided with a varied diet of small meaty foods like mysis shrimp, brine shrimp, and finely chopped seafood.

Reproduction

In the wild, Blackfin Dartfish are pelagic spawners, releasing their eggs and sperm into the water column where fertilization occurs. The larvae are planktonic before settling to the reef. In the aquarium, breeding is not commonly reported, but providing a stress-free environment with excellent water quality can encourage spawning behavior.

Habitat

Rhabdamia nigrimentum is found in the Indo-Pacific region, from the Maldives to the Philippines, and north to southern Japan. They inhabit coral reefs and lagoons, often found hovering above the substrate or hiding among the branches of corals at depths ranging from 2 to 30 meters.