Fast Facts

  • Classification
    Species
    marmorata
    Genus
    Anguilla
    Family
    Anguillidae
    Order
    Anguilliformes
    Subdivision
    Elopomorpha
    Class
    Actinopterygii
    Subphylum
    Vertebrata
    Phylum
    Chordata
    Kingdom
    Animalia
  • Size Range
    It grows to about 2 m in length.

Introduction

The Giant Mottled Eel is one of the largest species of eels in the world and is the most widely distributed species of anguillid eel.

Identification

The species can be distinguished from other anguillid eels by its mottled colouration, arrangement of teeth and the long dorsal fin, which begins closer to the gill opening than to the anus. The teeth in both jaws are arranged in two or three rows. One row consists of distinctly enlarged teeth that often form a cutting edge. The inner row comprises smaller teeth that are usually separated from the cutting row by a narrow toothless groove.

Distribution

It is found in warm freshwater habitats including small oceanic islands from the western Indian Ocean across the Indo-Pacific to French Polynesia, and as far north as southern Japan.

Ozcam map of Gian Mottled Eel specimens in the Australian Museums. http://ozcam.ala.org.au/occurrences/search?taxa=Anguilla+marmorata#mapView

Breeding behaviours

The Giant Mottled Eel is known to have multiple spawning populations.  One of its largest populations lives in the areas adjacent to the western North Pacific (e.g. northern Indonesia, Philippines, Taiwan, Japan) and has an offshore spawning area in the same oceanic region of the North Equatorial Current as the Japanese eel, Anguilla japonica.

Further reading

  1. Kuroki, M., J. Aoyama, M. J. Miller, T. Yoshinaga, S. Shinoda, S. Hagihara, and K. Tsukamoto. 2009. Sympatric spawning of Anguilla marmorata and Anguilla japonica in the western North Pacific Ocean. Journal of Fish Biology 74: 1853–1865.
  2. Watanabe, S., M. J. Miller, J. Aoyama, and K. Tsukamoto. 2009. Morphological evaluation of the population structure of Anguilla marmorata across its range. Journal of Fish Biology 74: 2069–2093.
  3. Minegishi Y., J. Aoyama, and K. Tsukamoto. 2008. Multiple population structure of the giant mottled eel Anguilla marmorata. Molecular Ecology 17: 3109–312.
  4. Smith, D.J. Anguillidae. Freshwater eels. in Carpenter, K.E. & V.H. Niem (ed) The Living Marine Resources of the Western Central Pacific. Vol. 3. FAO species identification guide for Fishery purposes. FAO. Pp. 2068.