Purple Firefish - Nemateleotris decora
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The Purple Firefish (Nemateleotris decora), also known as the Decorator Firefish, is a stunning and active reef fish prized for its elongated body, vibrant purple and red coloration, and graceful hovering behavior. This peaceful species adds color and movement to reef tanks and is ideal for aquarists seeking a visually striking but manageable fish.
Common Name: Purple Firefish, Decorator Firefish
Scientific Name: Nemateleotris decora
Family: Gobiidae
Size: Up to 3 inches (7.5 cm)
Temperament: Peaceful
Difficulty: Moderate
Reef Safe: Yes
Native Region: Found throughout the Indo-Pacific, including Indonesia and the Philippines, typically inhabiting reef slopes and lagoons with sandy patches and small crevices.
Tank Size: Minimum of 20 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate: Fine sand bed with live rock for shelter; provides open swimming areas and secure crevices.
• Behavior: Peaceful, active swimmers; may hover above substrate or dart quickly into hiding when startled.
• Diet: Carnivorous—feed a variety of frozen or live foods such as mysis shrimp, brine shrimp, and finely chopped seafood.
• Tankmates: Compatible with other peaceful fish; avoid aggressive or territorial species.
• Cover: Provide a tight-fitting lid, as this species is known to jump when startled.