Common name: Helfrichi Firefish

General information

Helfrich's Dartfish (Nemateleotris helfrichi) is a small, vibrantly colored fish that is highly sought after in the reef aquarium trade. It is known for its striking purple, yellow, and white coloration, which makes it a standout addition to any marine aquarium. This species is relatively peaceful and can be shy, often hiding in rockwork or burrows when startled.

Care

Helfrich's Dartfish requires a well-established aquarium with plenty of live rock for hiding and a sandy substrate to burrow in. They are jumpers, so a tight-fitting lid or screen top is essential to prevent escape. These fish do best in a peaceful community and can be kept singly or in pairs. They are carnivorous and should be fed a varied diet of meaty foods, such as brine shrimp, mysis shrimp, and finely chopped seafood.

Reproduction

In the aquarium, Helfrich's Dartfish are not commonly bred due to their complex larval stage. However, they are known to form monogamous pairs and have been observed spawning in captivity. The eggs are pelagic, and the larvae require specialized care that makes rearing them a challenge for most hobbyists.

Habitat

Nemateleotris helfrichi is found in the Western Pacific, from the Marshall Islands to Samoa, and north to the Ryukyu Islands. They inhabit outer reef slopes and drop-offs, typically at depths ranging from 25 to 90 meters. In their natural habitat, they are often seen hovering above burrows or darting into crevices when threatened.