HomeFish encyclopediaRay-finned fishesPerch-like fishWormfishesSpotside wormfish Spotside wormfish (Microdesmus suttkusi) Scientific name: Microdesmus suttkusi Gilbert, 1966 The Spotside wormfish (Microdesmus suttkusi) is a brackish-water fish of the family Microdesmidae. Native range: Eastern Central Pacific, Costa Rica. BiologyDorsal spines (total): 28; Vertebrae: 67 - 69. Body with a distinct row of round to diagonal spots along side, which anteriorly are confluent with a well-defined dark streak running posteriorly from the eye, and with a row of asymmetrically placed oblong spots on either side of dorsal fin; pigment present along about two-thirds of length of dorsal and anal elements.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMicrodesmus suttkusiFamilyMicrodesmidae (Wormfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length10.5Depth range0–2 m (0–7 ft)EnvironmentMarine; brackish; demersal; depth range 0 - 2 mClimateTropicalDistributionEastern Central Pacific: Costa Rica.Conservation status (IUCN)Data deficient (DD)Threat 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