HomeFish encyclopediaRay-finned fishesPerch-like fishPike-, tube- and flagblenniesOrangeflag blenny Orangeflag blenny (Emblemariopsis dianae) Scientific name: Emblemariopsis dianae Tyler & Hastings, 2004 The Orangeflag blenny (Emblemariopsis dianae) is a marine fish of the family Chaenopsidae. Native range: Western Central Atlantic, Belize. BiologyDorsal spines (total): 20; Dorsal soft rays (total): 11-12; Anal spines: 2; Anal soft rays: 20; Vertebrae: 36 - 37. The males of this species are unique among the species of its congeners in having a bright orange flag on the distal one-third to one-fourth of the anterior region of the spinous dorsal fin, the color is mostly confined to between the first and third spines (tapering in some larger specimens to terminate posteriorly between third and fourth spines, with much less orange color in the tapering region) and without a chalky white band along the ventral margin of the orange flag; modally with 3 mandibular sensory pores.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEmblemariopsis dianaeFamilyChaenopsidae (Pike-, tube- and flagblennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length2.1Depth range2 m (7 ft)EnvironmentMarine; reef-associated; depth range ? - 2 mClimateTropicalDistributionWestern Central Atlantic: Belize.Conservation status (IUCN)Not EvaluatedThreat 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