HomeFreshwater aquarium fishRainbowfish & killifishYellowbelly gudgeon Yellowbelly gudgeon (Allomogurnda nesolepis) Scientific name: Allomogurnda nesolepis Weber, 1907 The Yellowbelly gudgeon (Allomogurnda nesolepis) is a freshwater fish of the family Eleotridae that grows to about 4.5 cm (1.8 in). It is difficult to keep and peaceful, is best kept in a species tank and needs a tank of at least 55 L (15 US gal), water at 21–26°C (70–79°F) and a pH of 5.5–7.0. Native range: Asia and Oceania, New Guinea. Yellowbelly gudgeon care at a glanceCare levelDifficultTemperamentPeacefulCommunity tankNot suitableAdult size4.5 cm (1.8 in)Minimum tank55 L (15 US gal)Temperature21–26°C (70–79°F)pH5.5–7.0Hardness2–5 dGH (36–89 ppm)DietOmnivore. Accepts flakes, freeze-dried foods, frozen foods and live foods. BiologyDorsal spines: 8; Dorsal soft rays: 9-11; Anal spines: 1; Anal soft rays: 7 - 10. Can be diagnosed by having the following characters: dorsal fin rays VII +I,9-11; anal fin rays I,7-10; pectoral fin rays 13-15; branched caudal fin rays 14-15; lateral scale rows 34-42, transverse scale rows 10-13; zigzag scale rows on caudal peduncle 9; and gill rakers on first arch 1-2 + 5-8.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAllomogurnda nesolepisFamilyEleotridae (Sleepers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length4.6EnvironmentFreshwater; benthopelagicClimateTropicalDistributionAsia and Oceania: New Guinea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More rainbowfish & killifishKamaka rainbowfishMelanotaenia kamakaFlagfishJordanella floridaeBluefin killifishLucania goodeiBanded rainbowfishMelanotaenia trifasciataStriped panchaxAplocheilus lineatusRedtail nothoNothobranchius guentheriSee all rainbowfish & killifish Can it live with...?Yellowbelly gudgeon and Banded rainbowfishYellowbelly gudgeon and Blackfin pearlfishYellowbelly gudgeon and Dwarf rainbowfishYellowbelly gudgeon and Forktail rainbowfishYellowbelly gudgeon and Javanese ricefishYellowbelly gudgeon and Kamaka rainbowfishYellowbelly gudgeon and Lake Kutubu rainbowfishYellowbelly gudgeon and Mountain rainbowfishYellowbelly gudgeon and Murray river rainbowfishYellowbelly gudgeon and Red rainbowfishYellowbelly gudgeon and Tami River rainbowfish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026