Saltwater Aquarist

Curious Wormfish

(Gunnelichthys curiosus)

Curious Wormfish

Species Description…

Scientific Name: Gunnelichthys curiosus
Common Name: Curious Wormfish
Species Group: Goby
Habitat: Reef Safe
Care Level: Intermediate
Temperament: Peaceful
Diet Type: Carnivore
Role in Aquarium: Community Fish
Max Fish Length: 5 (inches)
Min Aquarium Size: 30 (gallons)
Native Range: Indo-Pacific, including the Red Sea and Western Pacific

Overview

  • Native to the Indo-Pacific, found in sandy reef areas and seagrass beds.
  • Recognized for its elongated, eel-like body with a translucent appearance.
  • Frequently seen hovering close to the substrate, retreating into burrows when startled.
  • A peaceful and timid species best kept in a calm aquarium environment.
  • Highly social in nature, often seen in small groups in the wild.

Feeding

  • Carnivorous diet, primarily consuming small zooplankton and tiny crustaceans.
  • Prefers live foods such as copepods, amphipods, and mysis shrimp.
  • Can be trained to accept frozen foods but may require patience when adapting.
  • Best fed multiple times per day due to its high metabolism.
  • Supplementing with vitamin-enriched foods helps maintain optimal health and coloration.

Habitat

  • Typically found in sandy-bottomed areas near coral reef edges.
  • Prefers an aquarium with a fine sand substrate to allow for burrowing behavior.
  • Requires stable water conditions with moderate water flow.
  • Best suited for peaceful reef tanks with ample hiding spots.
  • A minimum tank size of 50 gallons is recommended to accommodate its activity level.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C).
  • Ideal pH range: 8.1-8.4, with a specific gravity of 1.023-1.026.
  • Requires excellent water quality and minimal fluctuations in parameters.
  • Can be sensitive to sudden movements or aggressive tank mates.
  • Regular water changes and a stress-free environment promote longevity.

Compatibility

  • Best suited for peaceful reef tanks with non-aggressive species.
  • Compatible with small gobies, dartfish, firefish, and peaceful wrasses.
  • Should not be housed with large or aggressive fish that may intimidate it.
  • Reef-safe and does not harm corals or invertebrates.
  • Thrives in a group setting but can also be kept singly in a well-structured tank.

Aquarium Behavior

  • Often seen hovering just above the substrate, moving gracefully in the water column.
  • Retreats into burrows when frightened but emerges once it feels safe.
  • Curious and social but needs a peaceful environment to thrive.
  • Prefers dim lighting or shaded areas within the aquarium.
  • Thrives in an environment with plenty of open space and minimal competition for food.