Common name: Giant moray

Scientific name: Gymnothorax javanicus (Bleeker, 1859)

General information

The Giant Moray (Gymnothorax javanicus) is one of the largest moray eels and a striking presence in any aquarium. It is known for its impressive size and can grow up to 3 meters in length in the wild, although in captivity they usually reach around 60 cm. Their body is elongated and muscular, with a brownish background color and a pattern of dark spots that provide camouflage among the reefs.

Details

Recommended minimum tank volume
400 liter (110 gallons)
Salinity
S.G. 1.020 to 1.026
Temperature
22 to 28 °C (72 to 82 °F)
Acidity
pH 7.8 to 8.4
Average size
2 m (6′7″)
Care level
Moderate to difficult Needs hiding places
Diet
Carnivore Prefers live or frozen food
Social
Solo Territorial, best kept alone
Reefsafe
No May eat small fish/inverts
Aggression
Aggresive Can be aggressive to tankmates
Captive bred
No

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Eels
    Anguilliformes
  5. Family
    Moray Eels
    Muraenidae
  6. Genus
    Moray Eels
    Gymnothorax
  7. Species
    Giant moray
    Gymnothorax javanicus (Bleeker, 1859)
  8. Synonyms
    Gymnothorax javonica (Bleeker, 1859)
    Gymnothorax mindanoensis Borodin, 1930
    Lycodontis javanicus (Bleeker, 1859)
    Muraena javanica Bleeker, 1859

Care

Giant Morays require a large and well-structured aquarium with plenty of hiding places to feel secure. They are carnivorous and need a diet consisting of meaty foods such as fish, squid, and crustaceans. It's important to feed them with tongs to avoid accidental bites, as they have poor eyesight and a strong bite reflex. Due to their size and potential aggressiveness, they are not recommended for a community tank with small fish or invertebrates.

Reproduction

In the wild, Giant Morays reproduce by releasing eggs and sperm into the water column, where fertilization occurs. The larvae then drift in the open ocean before settling on the reef. Breeding in captivity is rare and challenging due to their large size and the difficulty in mimicking their natural spawning conditions.

Habitat

Giant Morays are found in the Indo-Pacific region, from the eastern coast of Africa to Hawaii, and from Japan to Australia. They prefer reef environments and are often seen with just their heads protruding from crevices during the day. At night, they become more active and hunt for prey.