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Onespot Wormfish (Gunnellichthys monostigma)

Find Onespot Wormfish across reef-livestock retailers on ReefDock. Compare sources, check known pricing where available, and review care information before you buy.

Onespot Wormfish
Photo: (c) Shigeru Harazaki, all rights reserved, uploaded by Shigeru Harazaki
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Where to buy Onespot Wormfish

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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    Search Saltwaterfish
  • Amazon

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  • Petco

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About Onespot Wormfish

A small, elongated eel-like fish with a pale tan or yellowish body. The defining characteristic is a single dark spot or ocellus on the shoulder area behind the gill cover. The body is relatively streamlined with a pointed snout, and the dorsal and anal fins run nearly the entire length of the body.

Key facts

Difficulty Level
The Onespot Wormfish is challenging for most aquarists due to its specialized feeding requirements, tendency toward finickiness, and need for meticulous water quality. Success requires experience with delicate feeders and stable reef conditions.
Temperament
Peaceful
Reef safety
Reef Safe with Caution
Appearance
A small, elongated eel-like fish with a pale tan or yellowish body. The defining characteristic is a single dark spot or ocellus on the shoulder area behind the gill cover. The body is relatively streamlined with a pointed snout, and the dorsal and anal fins run nearly the entire length of the body.
Water Parameters
Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Family
Congridae
Min tank size
75 gallons
Max Size
7
Care Level
Hard
Common Health Issues
Marine ich, Fin Rot, Swim Bladder Disorder, Hole-in-the-Head Disease, Columnaris Disease
Origin
Indo-Pacific region, including the Red Sea, East Africa, and extending to the Pacific Islands. Found on coral reef slopes and rubble areas at depths typically between 20–80 meters.
Care Requirements
• Minimum 75 gallon tank • Temperature range: 72–78°F • pH range: 8.1–8.3 • Salinity: 1.023–1.025 SG • Provide plenty of rubble, sand, and rockwork for shelter and foraging; bury PVC tubes if needed to create secure hiding spots • Feed small, frequent meals of quality frozen or live small crustaceans; some individuals are extremely difficult feeders and may require live copepods or amphipods

Research before you buy

ReefDock is the sister app to Reef Trak. Use Reef Trak to research and log fish, keep tank parameters organized, and maintain a complete livestock history. Log this fish on Reef Trak.

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