HomeFish encyclopediaRay-finned fishesLive bearers, Killifishes and RivulinesSplitfinsBlackspot allotoca Blackspot allotoca (Allotoca maculata) Scientific name: Allotoca maculata Smith & Miller, 1980 The Blackspot allotoca (Allotoca maculata) is a freshwater fish of the family Goodeidae. In the aquarium it needs water at 22–26°C (72–79°F). Native range: North America, Jalisco, Mexico. Blackspot allotoca care at a glanceTemperature22–26°C (72–79°F) BiologyDorsal soft rays (total): 13-14; Anal soft rays: 11 - 13. Diagnosis: A small species with dorsal and anal fins set far back on body, but less posterior than in Allotoca dugesi. Predorsal length 64-68%. Dorsal origin slightly ahead of anal origin. Dorsal rays usually 13 or 14. Anal rays usually 11-13. Lateral scales 28-32. Mandibular pores absent. Adult fins dimorphic, longer in males which have dorsal and anal fins rounded and elevated. Deep body and compressed. The coloration is distinctive, fins mostly clear, one or more irregular dark spots on caudal peduncle, females with 3-6 lateral blotches of iridescent blue, males with a lateral series of fine dark spots. Diploid chromosome number 48, no metacentrics.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAllotoca maculataFamilyGoodeidae (Splitfins)OrderCyprinodontiformes (Live bearers, Killifishes and Rivulines)ClassActinopterygii (Ray-finned fishes)Maximum length6.5EnvironmentFreshwater;; pH range: 7.0 - 7.7; dH range: 5 - 20 demersalClimateTropicalDistributionNorth America: Jalisco, Mexico.Conservation status (IUCN)Critically Endangered (CR) (B1+3abc)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