Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Elopocephalai
Supercohors: Elopocephala
Cohors/Superordo: Elopomorpha
Ordo: Anguilliformes
Subordo: Anguilloidei
Familia: Anguillidae
Genus: Anguilla
Species: Anguilla reinhardtii
The speckled longfin eel, Australian long-finned eel or marbled eel (Anguilla reinhardtii) is one of 15 species of eel in the family Anguillidae. It has a long snake-like cylindrical body with its dorsal, tail and anal fins joined to form one long fin. It usually has a brownish green or olive green back and sides with small darker spots or blotches all over its body. Its underside is paler.[1] It has a small gill opening on each side of its wide head, with thick lips. It is Australia's largest freshwater eel, and the female usually grows much larger than the male.[1][2] It is also known as the spotted eel.
Description
Long-finned eels can grow to 1.6 metres and 22 kg (although generally to 1 metre) for females while males are much smaller at 650 mm and 600 g.[3] Landlocked eels have been reported to grow to 3 metres (10 feet).[2]
Distribution
The long-finned eel is a native of New Guinea, eastern Australia (including Tasmania), Lord Howe Island, and New Caledonia.[1] It can be found in many freshwater areas, including creeks, streams, rivers, swamps, dams, lagoons, and lakes although generally more often in rivers than lakes.[2]
Breeding and migration
Like other Anguilla species, the eel lives predominantly in freshwater rivers and streams, but is born in deep waters of the ocean. Each species has its own spawning grounds; spawn use ocean currents to return to their adult species range. The long-finned eel spawns in the Western arm of the Southern Equatorial Current,[4] which carries spawn to the eastern coast of Australia. This species is panmictic, spawning throughout the year.[5]
References
Allen, G.R.; Midgley, S.H.; Allen, M. (2002). Freshwater Fishes of Australia. Perth, Western Australia: Western Australian Museum. p. 64. ISBN 0-7307-5486-3.
Merrick, J.R.; Schmida, G.E. (1984). Australian Freshwater Fishes, Biology and Management. Sydney: Author. pp. 61–63. ISBN 0-9591908-0-5.
Robert McDowall, ed. (1996). Freshwater Fishes of South-Eastern Australia (Rev Ed). Sydney: Reed Books. pp. 42–43. ISBN 0-86622-936-1.
Aoyama, Jun (2009). "Life History and Evolution of Migration in Catodromous Eels (Genus Anguilla)" (PDF). Aqua-BioScience Monographs. 2: 23. doi:10.5047/absm.2009.00201.0001. S2CID 53319110. Archived from the original (PDF) on 2020-01-26.
Shen, Kang-Ning; Tzeng, Wann-Nian (2007). "Population Genetic Structure of the Year-Round Spawning Tropical Eel, Anguilla reinhardtii, in Australia". Zoological Studies. 46: 451. CiteSeerX 10.1.1.654.2742.
Froese, Rainer; Pauly, Daniel (eds.) (2006). "Anguilla reinhardtii" in FishBase. February 2006 version.
Critters of Calamvale Creek
Inland Fisheries Service Tasmania Long-finned eel fact sheet
AUSECO
Royal Forest and Bird Protection Society
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