HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesTadpole goby Tadpole goby (Chlamydogobius ranunculus) Scientific name: Chlamydogobius ranunculus Larson, 1995 The Tadpole goby (Chlamydogobius ranunculus) is a freshwater fish of the family Gobiidae. Native range: Oceania, northern Australia. BiologyDorsal spines (total): 6 - 7; Dorsal soft rays (total): 6-8; Anal spines: 1; Anal soft rays: 5 - 7. Equal number of second dorsal and anal fin rays - consisting of 1 spine and 6 soft rays. Color: males blue-grey with dark scale margins and scattered black spots on head and body; first dorsal fin with broad yellow band across outer half; second dorsal and anal fins bluish on basal half, with a black stripe across center of fins and broad white margins; caudal fin dusky blue-grey with faint cross bands. Females mainly tan.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameChlamydogobius ranunculusFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.8EnvironmentFreshwater; brackish; demersalClimateTropicalDistributionOceania: northern Australia.Conservation status (IUCN)Not EvaluatedThreat 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