Helfrichi Firefish, Nemateleotris helfrichi, also go by the name Lilac Firefish. These fish have bright yellow faces and showcase stunning shades of pink and purple. Their large dorsal fin accentuates their streamlined form. Helfrichi Firefish can reach around 2-3 inches (6 centimetres) in length. Taxonomy and Identifying Features Belonging to the family Microdesmidae, the Helfrichi Firefish shares lineage with other Firefish species. Its genus name, Nemateleotris, originates from Greek roots, ‘nema’ meaning “thread,” signifying the filamentous extensions on its dorsal fin rays. Natural Habitat Helfrichi Firefish live in deep waters of the French Polynesia, generally on seaward slopes over sand or rubble. Their slender form allows they to bolt into small crevices should the need arise. Keeping Helfrichi Firefish Healthy: Maintaining Helfrichi Firefish demands moderate care. Stable water conditions with temperatures between 72-78°F (22-26°C) and a pH level of 8.1-8.4 are crucial. Provide adequate hiding spots to reduce stress. Special Requirements and Feeding Offer a varied diet comprising small crustaceans, mysis shrimp, and high-quality flake or pellet food. Regular feedings throughout the day are necessary to fulfil their dietary needs. We enrich all our frozen food with garlic and vitamins. These are imperative for keeping fish healthy by providing them with the nutrition otherwise lost in frozen food. In doing so, these additives support their immune systems and increase longevity. The garlic is also useful for helping to ward off white spot. Feel free to give us a call if you have any questions about feeding your firefish. In addition, firefish will also eat live foods, such as copepods and amphipods, that can be cultivated in attached refugium How Many Should I Keep? Helfrichi Firefish do well when kept singly or in pairs, allowing them to exhibit their natural behaviours without territorial disputes. Larger tanks can house multiple pairs with sufficient hiding spots. In the wild, Helfrichi Firefish are often seen in pairs as they are monogamous. Lighting Preference Moderate to low replicates their natural habitat, contributing to their well-being in captivity. Suitable Tank Mates Compatible tank mates include peaceful species like gobies, dartfish, or certain clownfish. Avoid aggressive or larger fish that might intimidate them. Sexual Dimorphism Sexual dimorphism in Helfrichi Firefish is minimal, making it challenging to distinguish between males and females based on external characteristics. Summary. Also known as the Lilac Firefish, the Helfrichi Firefish is a vibrant species with a yellow face and striking pink and purple body. It grows up to 2–3 inches and features an elongated form. Native to deep waters of French Polynesia, it prefers sandy slopes and crevices for shelter. Moderate care is required in aquariums with stable conditions (72–78°F, pH 8.1–8.4) and ample hiding spots. They thrive on a varied diet of enriched frozen foods, flakes, and live prey like copepods. Best kept singly or in pairs, they are peaceful and should be housed with similarly gentle tank mates.
