HomeFreshwater aquarium fishOther freshwater fishMarbled Lungfish Marbled Lungfish (Protopterus aethiopicus mesmaekersi) Scientific name: Protopterus aethiopicus mesmaekersi Poll, 1961 Photo: https://www.monsterfishkeepers.com/forums/threads/sub-species-of-protopterus-aethiopicus.535798/ The Marbled Lungfish (Protopterus aethiopicus mesmaekersi) is a freshwater fish of the family Protopteridae. Native range: Africa, Lower Congo River basin. Species factsScientific nameProtopterus aethiopicus mesmaekersiFamilyProtopteridae (African lungfishes)OrderLepidosireniformes (South American and African Lungfishes)ClassSarcopterygii (Lobe-finned fishes)Maximum length95.3EnvironmentFreshwater; demersalClimateTropicalDistributionAfrica: Lower Congo River basin.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: public aquariumsResilienceVery Low, minimum population doubling time more than 14 years (Assuming tmax > 30) More other freshwater fishFreshwater garfishXenentodon cancilaFinescale tigerfishDatnioides microlepisShort-tailed pipefishMicrophis brachyurus brachyurusPumpkinseedLepomis gibbosusLined soleAchirus lineatusSouth American lungfishLepidosiren paradoxaSee all other freshwater fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026