Firefish - Helfrichi (lavandula)Nematelotris helfrichi (lavandula) Care: Beginner Diet: Carnivorous Light: Medium Place of origin: Central Pacific Firefish Lilac are present in the Pacific Ocean from Indonesia to Tuamotu Archipelago. They have bright yellow head with purple forehead with purple and white shades on body. Due to their bright colour they are very popular as a marine aquarium fish. They are also more delicate and rare form than other more common firefish species.