Giant mottled eel

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Giant mottled eel

Least Concern  (IUCN 3.1)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Anguilliformes
Family: Anguillidae
Genus: Anguilla
Species:
A. marmorata
Binomial name
Anguilla marmorata
Gaimard
, 1824
Synonyms
  • Anguilla fidjiensis Günther, 1870
  • Anguilla hildebrandti Peters, 1881
  • Anguilla labrosa Richardson, 1848
  • Anguilla mauritiana Bennett, 1831
  • Anguilla ohannae Günther, 1867
  • Muraena manillensis Bleeker, 1864

The giant mottled eel (Anguilla marmorata), also known as the marbled eel, is a species of tropical anguillid eel that is found in the Indo-Pacific and adjacent freshwater habitats.[2]

Description

Specimen

Similar to other anguillids, the giant mottled eel is cylindrical with small, well-developed pectoral fins and a protruding lower jaw.[3] The eel has thick, fleshy lips.[3] The eel has dorsal and anal fins that are continuous around the tail, with the origin of the dorsal-fin between the pectoral fins and anus.[3] It has small, oval-shaped scales that are embedded in the skin.[3]

Unlike some other anguillid species, this species has a mottled color.

vertebrae.[2]

It can grow up to 2 meters (6.6 ft) for females and 1.5 meters (4.9 ft) for males and can weigh up to 20.5 

kilograms (45 lb),[2] making it the largest species of anguillid eels. The marbled eel can live up to about 40 years.[3]

Distribution and habitat

This anguillid species can be found from

endangered.[3][8]

In 2002, a single eel was captured from a pond close to Kaupo, Maui, Hawaii, though it is not indigenous to the area.[3]

Ecology and behaviour

Life cycle of eels

The adults of this species are

catadromous, migrating sometimes long distances out into the open ocean to spawning over deep water.[2] A spawning area of this species is known to be west of the Mariana Islands in an area of the North Equatorial Current in the western North Pacific, but other spawning areas are thought to exist in the western South Pacific and Indian Ocean.[9]

Marbled eels spend their adult lives in freshwater or estuarine habitats, and migrate to the ocean to reproduce.

leptocephali drift in ocean currents for months until they reach estuaries as glass eels where they migrate upstream into freshwater as elvers.[3] Then, after about 8 to 20 years in brackish or freshwater, the yellow eels grow up into silver eels (mature eels), and they return to the ocean for reproduction.[3]

Feeding

The marbled eel is

nocturnal, so it is active at night.[10]

Significance to humans

Like other anguillid eels, this species is used as a source of food in some regions.[3] Some restaurants buy live eels.[3] In 1992, for example, a typical 12 kilogram (26.5 lb) marbled eel retailed for one thousand US dollars in China.[3][11]

A giant mottled eel in the lagoon of Wallis island (South Pacific).

An eel habitat,

natural monument in South Korea.[12]

Large individuals of this species are also highly regarded and are not harmed by native people in some island groups of the western Pacific.

References

  1. doi:10.2305/IUCN.UK.2020-3.RLTS.T166189A176493885.en
    . Retrieved 20 November 2021.
  2. ^ a b c d e f g h i j k Froese, Rainer; Pauly, Daniel (eds.) (2006). "Anguilla marmorata" in FishBase. February 2006 version.
  3. ^ a b c d e f g h i j k l m n o p q r s USGS. "Anguilla marmorata (fact sheet)". Retrieved 2006-11-21.
  4. ^ a b c Discover Life. "Anguilla marmorata". Retrieved 2011-06-28.
  5. doi:10.1023/A:1007427724175
    .
  6. doi:10.1023/B:EBFI.0000005761.51686.f7
    .
  7. ^ McCosker, J. E.; Bustamante, R. H. & Wellington, G. M. (2003). "The freshwater eel, Anguilla marmorata, discovered at Galapagos" (PDF). Noticias de Galápagos. 62: 2–6. Retrieved 21 June 2011.
  8. doi:10.3354/meps261233
    .
  9. doi:10.1007/s00227-001-0754-9
    .
  10. ^
    ISBN 978-1-86872-643-1
    . Retrieved 23 June 2011.
  11. ^ Williamson, Gordon R.; Boëtius, Jan (1993). "The eels Anguilla marmorata and A. japonica in the Pearl River, China, and Hong Kong". Asian Fisheries Science. 6: 129–138.
  12. ISBN 978-0-470-18191-1
    .

External links

Wikimedia Commons has media related to Anguilla marmorata.
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