Saltwater Fish
Convict Blenny

Species Description…

Scientific Name: Pholidichthys leucotaenia
Common Name: Convict Blenny
Species Group: Blenny
Habitat: Reef Safe with Caution
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Carnivore
Role in Aquarium: Cleanup Crew
Max Fish Length: 10 (inches)
Min Aquarium Size: 50 (gallons)
Native Range: Indo-Pacific, including the Philippines and Indonesia
Pholidichthys leucotaenia - Convict Blenny

Pholidichthys leucotaenia (Convict Blenny)

Overview

  • Native to the Indo-Pacific region, typically inhabiting coral reefs and rocky crevices.
  • Distinctive eel-like body with striking black and white horizontal stripes, resembling a “convict” pattern.
  • Known for its unique burrowing and schooling behavior, often forming large groups.
  • Suitable for intermediate to advanced aquarists due to specific habitat requirements and behaviors.

Feeding

  • Carnivorous; naturally feeds on zooplankton, small crustaceans, and other tiny marine organisms.
  • Accepts various aquarium foods, including mysis shrimp, brine shrimp, finely chopped seafood, and marine pellets.
  • Multiple small feedings per day recommended to support optimal health and activity.
  • A diverse diet ensures nutritional balance and overall health.

Habitat

  • Requires medium to large aquariums (minimum 50 gallons) with deep sand beds, ample hiding spots, and live rock for burrowing.
  • Stable, mature aquarium conditions with excellent water quality are essential.
  • Provide plenty of caves, tunnels, and crevices to mimic their natural habitat.
  • Moderate water circulation and efficient filtration necessary for maintaining optimal conditions.

Fish Care

  • Ideal water temperature: 72-78°F (22-26°C).
  • Recommended pH level: 8.1-8.4; specific gravity: 1.020-1.025.
  • Sensitive to rapid changes in water parameters; regular monitoring and consistent maintenance required.
  • Regular checks for marine diseases and parasites; prompt intervention ensures continued health.

Compatibility

  • Generally peaceful, best housed with other peaceful to semi-aggressive marine fish.
  • Reef-safe; compatible with corals and most ornamental invertebrates.
  • Suitable tank mates include peaceful wrasses, gobies, dartfish, clownfish, and other non-aggressive species.
  • Avoid overly aggressive or predatory fish to ensure a stress-free environment.

Aquarium Behavior

  • Active burrower and swimmer, often forming tight groups and burrowing collectively.
  • Fascinating schooling behavior, especially when kept in small groups.
  • Generally peaceful and reclusive; spends significant time near or within its burrows.
  • Providing ample sand beds and hiding spots enhances natural behaviors and reduces stress.