Blue Gudgeon Dartfish - Ptereleotris heteroptera
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The Blue Gudgeon Dartfish (Ptereleotris heteroptera) is a graceful, peaceful reef fish prized for its slender profile and bright blue coloration. Often seen hovering in the water column above sandy bottoms, this dartfish adds elegant movement and a calm presence to community reef aquariums.
Common Name: Blue Gudgeon Dartfish, Blue Gudgeon Goby
Scientific Name: Ptereleotris heteroptera
Family: Ptereleotridae
Size: Up to 6 inches (15 cm)
Temperament: Peaceful
Difficulty: Moderate
Reef Safe: Yes
Native Region: Indo-Pacific region, commonly found over sandy flats and lagoon areas near reef structures.
Tank Size: Minimum of 30 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Decor: Open swimming space with rockwork and caves for retreat; a tight-fitting lid is essential as this species is prone to jumping.
• Behavior: Shy and non-aggressive; often kept singly or in pairs in larger tanks.
• Diet: Carnivorous—feeds on frozen mysis, brine shrimp, copepods, and finely chopped meaty foods.
• Tankmates: Best suited with other peaceful reef fish; avoid aggressive or fast-feeding species.
• Security: Provide multiple hiding spots to reduce stress and encourage natural hovering behavior.