HomeFish encyclopediaRay-finned fishesPerch-like fishWormfishesLancetail wormfish Lancetail wormfish (Microdesmus lanceolatus) Scientific name: Microdesmus lanceolatus Dawson, 1962 The Lancetail wormfish (Microdesmus lanceolatus) is a marine fish of the family Microdesmidae. Native range: Western Atlantic, known only from the northern Gulf of Mexico, but evidence from larvae suggests a wider distribution. BiologyBurrows in soft muddy and sandy bottoms in shallow waters.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMicrodesmus lanceolatusFamilyMicrodesmidae (Wormfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Depth range37 m (121 ft)EnvironmentMarine; demersal; depth range 37 - 37 mClimateTropicalDistributionWestern Atlantic: known only from the northern Gulf of Mexico, but evidence from larvae suggests a wider distribution.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026