Saltwater Fish
Blue Gudgeon

Species Description…

Scientific Name: Ptereleotris microlepis
Common Name: Blue Gudgeon
Species Group: Dartfish
Habitat: Reef Safe
Care Level: Beginner
Temperament: Peaceful
Diet Type: Carnivore
Role in Aquarium: Community Fish
Max Fish Length: 5 (inches)
Min Aquarium Size: 30 (gallons)
Native Range: Indo-Pacific, from the Indian Ocean to the western Pacific
Ptereleotris microlepis - Blue Gudgeon

Ptereleotris microlepis (Blue Gudgeon)

Overview

  • Native to the Indo-Pacific region, frequently found over sand and rubble substrates near reefs.
  • Distinctive slender body with a pale blue-green coloration and iridescent blue highlights along its sides.
  • Known for peaceful and timid behavior, typically hovering gracefully above the substrate.
  • Ideal choice for community reef aquariums due to its calm nature and attractive appearance.

Feeding

  • Carnivorous diet, naturally feeding on zooplankton and small crustaceans.
  • Accepts frozen and live foods such as mysis shrimp, brine shrimp, plankton, and finely chopped seafood.
  • Multiple small daily feedings recommended to maintain health and vibrant coloration.
  • A varied diet ensures nutritional balance and longevity.

Habitat

  • Prefers medium-sized aquariums (minimum 30 gallons) with open swimming spaces and plenty of hiding spots.
  • Stable, mature aquarium environment essential for long-term health.
  • Provide sandy substrates, caves, and live rock formations to replicate their natural habitat.
  • Gentle water movement and effective filtration required to maintain ideal water quality.

Fish Care

  • Optimal water temperature: 72-78°F (22-26°C).
  • Recommended pH: 8.1-8.4; specific gravity: 1.020-1.025.
  • Sensitive to abrupt water changes; regular water testing and careful maintenance important.
  • Monitor regularly for signs of marine diseases and parasites; timely treatment ensures optimal health.

Compatibility

  • Peaceful species suitable for community aquariums with non-aggressive tank mates.
  • Reef-safe; compatible with corals, ornamental shrimp, and other marine invertebrates.
  • Ideal tank mates include gobies, small wrasses, firefish, clownfish, and other peaceful marine species.
  • Usually kept singly or in pairs; groups may be kept in larger aquariums to minimize territorial disputes.

Aquarium Behavior

  • Calm and peaceful swimmer typically hovering in open water near the substrate.
  • Timid and shy by nature; quickly retreats to hiding places when startled.
  • Providing ample hiding spaces and peaceful surroundings helps reduce stress and encourages natural behavior.
  • Thrives in quiet, stable aquarium environments with gentle tank mates.