HomeMarine aquarium fishGobies, blennies & dottybacksDiadem dottyback Diadem dottyback (Pictichromis diadema) Scientific name: Pictichromis diadema Lubbock & Randall, 1978 The Diadem dottyback (Pictichromis diadema) is a marine fish of the family Pseudochromidae. In the aquarium it needs water at 24–26°C (75–79°F). Native range: Western Central Pacific, Peninsular Malaysia, the Philippines and northern Borneo. Diadem dottyback care at a glanceTemperature24–26°C (75–79°F) BiologyFound in sheltered reefs with rich coral growth. Small groups are found among coral or rocks. Minimum depth reported from.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePictichromis diademaFamilyPseudochromidae (Dottybacks)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.0Depth range5–30 m (16–98 ft)EnvironmentMarine; reef-associated; depth range 5 - 30 m, usually 5 - 25 mClimateTropicalDistributionWestern Central Pacific: Peninsular Malaysia, the Philippines and northern Borneo.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercial More gobies, blennies & dottybacksYellowhead jawfishOpistognathus aurifronsFire gobyNemateleotris magnificaYellow prawn-gobyCryptocentrus cinctusPersian blennyEcsenius midasWhitespotted longfinPlesiops nigricansOlive dottybackPseudochromis olivaceusSee all gobies, blennies & dottybacks SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026