HomeFish encyclopediaRay-finned fishesLightfishes and DragonfishesLightfishesBulldog lightfish Bulldog lightfish (Ichthyococcus irregularis) Scientific name: Ichthyococcus irregularis Rechnitzer & B?hlke, 1958 The Bulldog lightfish (Ichthyococcus irregularis) is a marine fish of the family Phosichthyidae. Native range: Eastern Pacific, throughout the California Current region, seaward of the continental shelf. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 11-13; Anal spines: 0; Anal soft rays: 13 - 15; Vertebrae: 38 - 39. Branchiostegal rays: 12.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameIchthyococcus irregularisFamilyPhosichthyidae (Lightfishes)OrderStomiiformes (Lightfishes and Dragonfishes)ClassActinopterygii (Ray-finned fishes)Maximum length7.6Depth range2213–3658 m (7260–12001 ft)EnvironmentMarine; bathypelagic; depth range 2213 - 3658 mClimateDeep-waterDistributionEastern Pacific: throughout the California Current region, seaward of the continental shelf.Conservation status (IUCN)Least Concern (LC)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