HomeFish encyclopediaRay-finned fishesSpiny eelsSwamp-eelsMalabar swampeel Malabar swampeel (Monopterus fossorius) Scientific name: Monopterus fossorius Nayar, 1951 The Malabar swampeel (Monopterus fossorius) is a freshwater fish of the family Synbranchidae. Native range: Asia, Kerala, India. BiologyOccurs in marshy areas, paddy fields, ditches and ponds. Burrows in the bottom of ditches and pools. The male guards and builds nest or burrow.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMonopterus fossoriusFamilySynbranchidae (Swamp-eels)OrderSynbranchiformes (Spiny eels)ClassActinopterygii (Ray-finned fishes)Maximum length23.0EnvironmentFreshwater; demersalClimateTropicalDistributionAsia: Kerala, India.Conservation status (IUCN)Endangered (EN) (B1ab(iii))Threat to humansHarmlessUsesFisheries: of no interestResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026