Macrognathus circumcinctus
No common name
Collection Details
Specimens
Photos
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Records
Taxonomic Hierarchy
Actinopterygii (Ray-finned Fishes)
Synbranchiformes (Swamp Eels)
Mastacembelidae (Spiny Eels)
Macrognathus
Macrognathus circumcinctus
Description
This species account was compiled from
FishBase (Froese, R. and D. Pauly. Editors. 2025. FishBase. World Wide Web electronic publication. www.fishbase.org, version 04/2025.)
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Characters
Body shape: eel-like. Differs from all other mastacembelids found in Myanmar and Thailand in having body with a series of very regular, oblique, dark bars, each with a narrow extension extending partially or entirely across abdomen, and having ripe females with a very elongate genital papillae (Ref. 39392).
Distribution
Asia: Mekong and Chao Phraya basins, southeastern Thailand, Malay Peninsula and Sumatra, Indonesia.
Habitat Associations
Freshwater. demersal.
Biology
Occurs in streams to peats (Ref. 57235). Found in medium to large-sized rivers and flooded fields (Ref. 12975). Nocturnal, feeding on invertebrates and small fishes (Ref. 13371). Commonly seen in aquarium trades and fish markets (Ref. 57235).
Max length: 28.6 cm TL; max weight: 67 g.
Reproductive mode: dioecism; fertilization: external; nonguarders; parental care: none.
IUCN Red List Status: Least Concern (LC), assessed 2019-12-11. Resilience: High (Preliminary K or Fecundity.).
References
Breder, C.M. and D.E. Rosen (1966) Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p.
Riehl, R. and H.A. Baensch (1996) Aquarien Atlas, Band 1. 10th edition. Mergus Verlag GmBH, Melle, Germany. 992 p.
Roberts, T.R. (1986) Systematic review of the Mastacembelidae or spiny eels of Burma and Thailand, with description of two new species of Macrognathus. Jap. J. Ichthyol. 33(2):95-109.
Kottelat, M. (2001) Fishes of Laos. WHT Publications Ltd., Colombo 5, Sri Lanka. 198 p.
Beamish, F.W.H., R. Plongsesthee, P. Chanintarapoomi and P. Nithirojpakdee (2011) Total length-weight relationships among Thai freshwater fishes and the influence of capture location and preservation. J. Appl. Ichthyol. 27:955-958. DOI: 10.1111/j.1439-0426.2010.01620.x
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