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Anguilla marmorata  Quoy & Gaimard, 1824

Giant mottled eel
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Native range | All suitable habitat | Point map | Year 2100
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Anguilla marmorata   AquaMaps   Data sources: GBIF OBIS
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Image of Anguilla marmorata (Giant mottled eel)
Anguilla marmorata
Picture by Warren, T.


Philippines country information

Common names: Almang, Anguilla, Casili
Occurrence: native
Salinity: freshwater
Abundance: common (usually seen) | Ref:
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Found to be rare in Lake Bombon (=Taal), except maybe at great depths (Ref. 12165, 13446). Migrated into Lake Mainit via Tubay River, Mindanao (Ref. 4867, 50320). Known from Pinacañauan River, Cagayan Prov.; Ilocos Sur; Bontoc, Mt. Prov.; mountains of Zambales near Iba; Laguna de Bay; Bicol River; Cabalian in Leyte; Pulangi, Mindanao; Sibuyan; Masbate; Polillo; Jolo Is.; Mindoro; Tarlac; Zamboanga; Manila (Ref. 280), and Lake Naujan (Ref. 13446); Lake Lanao (Ref. 13446); and Basey River, Samar (Ref. 7223). In northern Luzon, occur in mountain streams at an altitude or more than 1,530 meters (Ref. 12748). Referred to as A. mauritiana by some authors. Also Ref. 7223, 45114, 94476.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Herre, A.W.C.T., 1953
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Anguilliformes (Eels and morays) > Anguillidae (Freshwater eels)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 70.0 cm TL male/unsexed; (Ref. 57749); 200.0 cm TL (female); common length : 26.3 cm TL male/unsexed; (Ref. 35840); max. published weight: 20.5 kg (Ref. 13337); max. published weight: 20.5 kg; max. reported age: 40 years (Ref. 48660)

Environment

Marine; freshwater; brackish; demersal; catadromous (Ref. 51243); depth range 1 - 400 m (Ref. 6898)

Climate / Range

Tropical; 24°N - 33°S

Distribution

Indo-Pacific: East Africa, inland Mozambique and lower Zambezi River to French Polynesia, north to southern Japan.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Vertebrae: 100 - 110. Adults have a brownish to black marbling on their back on a greyish yellow background. This coloration can fade away. White belly. Younger specimens are greyish to orange and the marbling is less visible (Ref. 48622). Body color brown speckles scattered on back, sides and fins; yellow between speckles and edge of pectoral fin; belly white or pale blue (Ref. 45563). Head rounded; snout depressed; lower jaw protruded; gill openings small; scales matted-like under skin; pectoral fin rounded; pelvic fin absent (Ref. 45563). Distinguished from all other species by the mottled color and the long dorsal fin, which begins closer to the gill opening than to the anus (Ref. 9828).

Biology     Glossary (e.g. epibenthic)

Live in freshwater areas as adults, estuaries and seas as young (Ref. 12693). Found in lowland rivers as well as upland tributaries (Ref. 2847). While in river, the sex gland does not develop. But in winter when they move from the stream to river mouth, the sex gland begins to develop as mature individuals go to deep sea to breed (Ref. 45563). The spawning grounds are deep sea gullies among the south of the Philippines, east of Indonesia and Papua New Guinea (Ref. 45563). Are active at night, feeding on a wide range of prey (Ref. 7248, 79840), especially crabs, frogs and fish (Ref. 7248). Thought to breed east of Madagascar where the young are wafted to the East Coast by ocean currents (Ref. 13337, 79840).

IUCN Red List Status (Ref. 115185)

Threat to humans

  Harmless



Human uses

Fisheries: commercial; aquaculture: commercial; gamefish: yes

More information

Common names
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Predators
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Reproduction
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Fecundity
Eggs
Egg development
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Length-weight
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Morphometrics
Morphology
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Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.8   ±0.67 se; Based on food items.

Resilience (Ref. 69278)
Very Low, minimum population doubling time more than 14 years (tmax=40)

Vulnerability (Ref. 59153)
Very high vulnerability (75 of 100)
Price category (Ref. 80766)
Unknown