HomeFreshwater aquarium fishPuffers, gobies & brackish fishFull moony Full moony (Monodactylus falciformis) Scientific name: Monodactylus falciformis Lacep?de, 1801 The Full moony (Monodactylus falciformis) is a freshwater fish of the family Monodactylidae. Native range: Western Indian Ocean, Red Sea to False Bay, South Africa, Madagascar, and Reunion. BiologyInhabits coastal waters including estuaries and lagoons. Seldom enters freshwater. Juveniles can be kept in the aquarium. Caught with throw nets.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMonodactylus falciformisFamilyMonodactylidae (Moonyfishes or fingerfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length31.0EnvironmentMarine; freshwater; brackish; reef-associated; oceanodromousClimateTropicalDistributionWestern Indian Ocean: Red Sea to False Bay, South Africa, Madagascar, and Reunion.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercial More puffers, gobies & brackish fishBanded archerfishToxotes jaculatrixSilver moonyMonodactylus argenteusRhinogobius duospilusGlobe fishTetraodon lineatusAmazon pufferColomesus asellusSpotted scatScatophagus argusSee all puffers, gobies & brackish fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026