Yellow-Head Moray Eel

Yellow-Head Moray Eel

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The Yellow-Head Moray Eel (Gymnothorax fimbriatus) is a fascinating and visually striking saltwater eel often kept in marine aquariums. These eels are known for their unique appearance and somewhat docile nature, making them a popular choice for advanced marine aquarists. However, they require specific care and attention due to their size and potential predatory behavior. Here's a care guide for keeping a Yellow-Head Moray Eel in your saltwater aquarium.

Tank Size

A suitable tank size for a Yellow-Head Moray Eel should be at least 125 gallons (around 473 liters) or larger. They can grow quite large and need ample space.

Water Quality

Maintain stable water parameters, including a temperature range of 72-78°F (22-26°C) and a specific gravity of around 1.024-1.026. Regularly test and adjust pH, ammonia, nitrites, and nitrates to ensure optimal water quality.


Use a robust filtration system, such as a protein skimmer, to remove waste and maintain water clarity. Ensure efficient biological and mechanical filtration to cope with the eel's substantial waste production.


Yellow-Head Moray Eels are carnivorous and primarily feed on fish, crustaceans, and cephalopods. Provide them with a varied diet that includes high-quality frozen or live foods. Feed them whole fish, shrimp, squid, and other seafood.

Feeding Schedule

These eels are nocturnal feeders. Offer food after the tank lights go off to encourage their natural feeding behavior. Feed them every few days or as needed, depending on their appetite and the size of the prey items.


Yellow-Head Moray Eels are generally solitary and should be kept as the only eel in the tank. Carefully select tankmates that are too large to be considered prey by the eel.

Hiding Spots

Provide ample hiding spots using PVC pipes, large PVC fittings, or caves to make your Yellow-Head Moray Eel feel secure. Ensure that these hiding spots are escape-proof, as they can be expert escape artists.

Water Flow and Lighting

Maintain moderate water flow to provide oxygenation and simulate their natural habitat. Yellow-Head Moray Eels are nocturnal and don't require intense lighting.


Exercise extreme caution when handling these eels, as they have sharp teeth and can bite when feeling threatened.


Regularly monitor your eel for any signs of stress, disease, or aggression, and take appropriate actions if any issues arise.

Yellow-Head Moray Eels are intriguing and visually stunning additions to a saltwater aquarium but require careful consideration due to their size, predatory nature, and escape tendencies. Proper feeding, water quality, and a suitable environment are key to ensuring their well-being and maintaining a healthy and safe tank for both the eel and other tank inhabitants.