Common names from other countries
Environment: milieu / climate zone / rango de profundidad / distribution range
Ecología
; agua dulce; salobre demersal; potamodromo (Ref. 51243). Subtropical; 22°C - 34°C (Ref. 36880)
Central and South America: Mexico to northern Argentina.
Tamaño / Peso / Age
Madurez: Lm ? range ? - ? cm
Max length : 150 cm TL macho / no sexado; (Ref. 79717); common length : 50.0 cm TL macho / no sexado; (Ref. 35237)
Short description
Claves de identificación | Morfología | Morfometría
Body cylindrical and long; eyes small; dorsal and anal fins vestigial (Ref. 26543).
Body shape (shape guide): eel-like.
Facultative air-breathing (Ref. 126274); Anguilliform, has no pectoral and ventral fins; its dorsal and anal fins are vestigial (Ref. 27188). Adults inhabit streams, ponds, canals, drains, rice fields, both clear and turbid water (Ref. 11225). Nocturnal (Ref. 11225). Carnivore (Ref. 26543). The male guards and builds nest or burrow (Ref. 205). A protogynous hermaphrodite (Ref. 55367). Its being a facultative air-breather (Ref. 1468) explains, at least in part, why it is often missing from faunal inventories. At the start of the dry season when there's a decline in water level, it digs a tubular burrow in a bank or on the bottom. This burrow, which is for the most part sub-horizontal , can have several diverticula, followed by a vertical section which leads to the exterior by only one opening. Although breathing is slowed down, the fish remains active and flees if it is disturbed (Ref. 27188).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
A diandric species having both primary and secondary male developmental pathways. Length at sex change = 34.0 cm TL (Ref. 55367). Also Ref. 35344, 103751.
Kullander, S.O., 2003. Family Synbranchidae (Swamp-eels). p. 594-595. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 79717)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Pesquerías: comercial; Acuario: Acuarios públicos
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Referencia
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00091 (0.00058 - 0.00143), b=3.08 (2.95 - 3.21), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Nivel trófico (Referencia
69278): 2.8 ±0.51 se; based on food items.
Resiliencia (Referencia
120179): Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
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Nutrients (Ref.
124155): Calcium = 61.2 [27.2, 179.0] mg/100g; Iron = 1.04 [0.48, 2.53] mg/100g; Protein = 18.6 [16.4, 20.6] %; Omega3 = 0.137 [0.065, 0.296] g/100g; Selenium = 18.4 [7.0, 49.4] μg/100g; VitaminA = 10.4 [2.5, 42.9] μg/100g; Zinc = 0.889 [0.522, 1.479] mg/100g (wet weight);
