Common name: Blacktail goby

General information

The Blackfin Dartfish, also known as the Scissortail Dartfish or Scissortail Goby, is a peaceful and attractive fish that is well-suited for community reef aquariums. Its scientific name is Ptereleotris heteroptera. This species is known for its elongated body, striking coloration with a white front merging into a black rear, and the characteristic scissor-like shape of its tail.

In the wild, these fish are often found in schools hovering above the reef, darting into crevices when frightened. They are a popular choice among aquarists due to their interesting behavior and compatibility with a wide range of other marine species.

Care

Blackfin Dartfish are relatively easy to care for but do require a tank with plenty of hiding places and a sandy substrate to mimic their natural habitat. They are jumpers, so a well-fitting aquarium lid is essential to prevent escape. These fish are not aggressive and can be kept with a variety of tank mates. They thrive on a diet of small meaty foods such as mysis shrimp, brine shrimp, and finely chopped seafood.

Reproduction

In the aquarium, Blackfin Dartfish have been known to spawn. They are pelagic spawners, releasing eggs and sperm into the water column where fertilization occurs. The larvae are planktonic and can be challenging to raise due to their small size and specific feeding requirements.

Habitat

Ptereleotris heteroptera is found in the Indo-Pacific region, from the Red Sea and East Africa to the central Pacific. They prefer clear lagoons and seaward reefs, often at depths ranging from just below the surface to about 35 meters. They are typically seen in pairs or small groups hovering above the substrate or hiding among the rocks and coral.