HomeFish encyclopediaRay-finned fishesSilversidesNeotropical silversidesKey silverside Key silverside (Menidia conchorum) Scientific name: Menidia conchorum Hildebrand & Ginsburg, 1927 The Key silverside (Menidia conchorum) is a brackish-water fish of the family Atherinopsidae. Native range: Western Atlantic, lower Florida Keys in USA. Species factsScientific nameMenidia conchorumFamilyAtherinopsidae (Neotropical silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length5.0EnvironmentMarine; brackish; pelagic-neriticClimateTropicalDistributionWestern Atlantic: lower Florida Keys in USA.Conservation status (IUCN)Lower Risk: near threatened (LR/nt)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026