Gymnothorax funebris

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Facts
Latin name Gymnothorax funebris - Ranzani, 1839
Local name Green moray
Family Muraenidae - Gymnothorax
Origin West Indian Ocean, The Mexican Golf, West Atlantic
Max length 250 cm (98,4")
As aquarium fish
Minimum volume 2000 cm (528 gal)
Hardiness Hardy
Suitable for aquarium Suitable for special aquariums
Reef safe Reef safe with caution
Aggressiveness Might be aggressive towards similar species
Feed
Recommended Larger crustaceans (Shrimp, crabs...)
Fish
Beware of
Threat towards crustaceans

This species poses a threat towards shrimps and crabs etc., which are relatively small.

Escape specialist

Morays can easily escape from aquaria, they can even move loose lids and glass covers without problems.

Threat to larger fish

This species can pose a threat towards fish that are relatively large in comparison to its own size. 

Demand a very large aquarium when fully grown

This species needs a very large aquarium when fully grown.

Exactly how big the aquarium should be is hard to say, but the size of this species is such, that it cannot normally be kept in a home aquarium.

Feeding of Moray eels

Morays should be fed a large meal every 3-4 days, as they otherwise can harm themselves by over eating.
If one has problems with getting the Morays to eat frozen fish or crustaceans, try moving the food in front of the fish with a tweezer. 

Do note, that the food must be varied and raw/fresh, whole shrimps or smelt (small fish) for example.

It can take a week before they start feeding in the aquarium, but this is not a problem.
Try feeding them live fish or shrimp if the Morays iare not eating frozen foods after a week. 

Keep in mind
Acclimitises best as a juvenile

This species will better acclimatize to the aquarium`s condition if introduced, when young.

Very small individuals can be very delicate.

Rearranges rocks and sand

This species has a habit of rearranging rocks and sand.

Make sure rocks are placed securely on the substrate, so they cannot toppled over.

Hiding places

This species needs good hiding places, for example, between live rocks.

Descriptions and further reading
Family description (Muraenidae)

Moray eels (Muraenidae) are predatory fish that will most commonly live off fish or crustaceans. 

To avoid overfeeding, the Moray must only be fed every 3-4 days, but may then also have a large meal.

They may dig up the substrate or move loose objects in the aquarium, so fastening the rocks and corals to the tank is a good idea.
Moray eels can easily escape from the tank if not tightly closed. They can lift lids and glass covers, do not underestimate their escape ability.

It is important that the Moray can, with its full length, hide between the rocks.

There are a few Moray eels which are suitable for reef aquaria, but the bigger species can only live in large tanks with other big fish.

Many Morays have a slightly poisonous bite, although it is not normally dangerous for people. One must not underestimate the strength of their bite however.  

FishBase
Distribution Western Atlantic: New Jersey (USA), Bermuda, and northern Gulf of Mexico to Brazil. Recorded once from Nova Scotia, Canada. Eastern Atlantic and eastern Pacific (Ref. 26340).
English common names Green congo
Green moray
Green cong
Black moray
Danish common names Grøn muræne
References and further reading

About references

Scott W. Michael. 2001. Reef Fishes volume 1 - TFH Publications / Microcosm Ltd. - (English)
Frank Marini. 2002. A Serpent For Your Reef Tank: A Look at Fish-Safe Eels - Reefkeeping Magazine - (English)
Mike Maddox. 2009. Morays! - Tropical Fish Hobbyist Magazine - (English)
Kirby Adams. Five Favorite Eels - Wet Web Media - (English)
Bob Fenner. The Moray Eels, Family Muraenidae, pt. 1 - Wet Web Media - (English)
Bob Fenner. The Moray Eels, Family Muraenidae, pt. 2, Less Aquarium Suitable Species - Wet Web Media - (English)
Marco Lichtenberger. 2007. Moray Eels Bite—But Are They Poisonous? - Tropical Fish Hobbyist - (English)