HomeFish encyclopediaRay-finned fishesPerch-like fishRonquilsSearcher Searcher (Bathymaster signatus) Scientific name: Bathymaster signatus Cope, 1873 The Searcher (Bathymaster signatus) is a marine fish of the family Bathymasteridae. In the aquarium it needs water at 1–2°C (34–36°F). Searcher care at a glanceTemperature1–2°C (34–36°F) BiologyDorsal spines (total): 0; Dorsal soft rays (total): 47; Anal spines: 0; Anal soft rays: 32 - 34. Caudal fin narrow, gently rounded. Brown on the dorsal surface with dark markings, lighter ventrally with yellow to orange streaks; yellow on head in some areas and yellow mottling on fins; black blotch on anterior part of dorsal fin for first 3 to 5 rays, conspicuous; pelvic fins dusky and some dark marks on other fins; eyes reputed to be blue.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBathymaster signatusFamilyBathymasteridae (Ronquils)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length38.0Common length30.0Depth range0–825 m (0–2707 ft)EnvironmentMarine; demersal; depth range 0 - 825 m, usually 35 - 380 mClimatePolarDistributionArctic, Northwest to Northeast Pacific: East Siberian Sea to eastern Kamchatka and the Commander Islands, Russian and Washington, USA; including Hokkaido, Japan and the Sea of Okhotsk.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026