HomeFreshwater aquarium fishSouth & Central American cichlidsBlue acara Blue acara (Aequidens pulcher) Scientific name: Aequidens pulcher Gill, 1858 The Blue acara (Aequidens pulcher) is a freshwater fish of the family Cichlidae that grows to about 16 cm (6.3 in). It is easy to keep and semi-aggressive and needs a tank of at least 110 L (29 US gal), water at 20–25°C (68–77°F) and a pH of 6.0–7.7. Native range: South America, Northern Venezuela; also Trinidad. Blue acara care at a glanceCare levelEasyTemperamentSemi-aggressiveAdult size16 cm (6.3 in)Minimum tank110 L (29 US gal)Temperature20–25°C (68–77°F)pH6.0–7.7Hardness3–20 dGH (54–357 ppm)DietOmnivore. Accepts flakes, frozen foods and live foods. BiologyAnal spines: 3. Aequidens is very similar to Geophagus but is differentiated by the number of spines on the anal fin and the lacks of a lobule on the first branchial arch found in Geophagus; live specimens olive green, with eight obscure transverse bands on the body; numerous bright bluish-green lines on the cheek; males are more colorful and grow bigger than females; males blue in color during the reproductive season.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAequidens pulcherFamilyCichlidae (Cichlids)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length16.0EnvironmentFreshwater;; pH range: 6.5 - 8.0; dH range: ? - 25 benthopelagicClimateTropicalDistributionCentral and South America: Trinidad and Venezuela.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercial; aquarium: highly commercialResilienceHigh, minimum population doubling time less than 15 months (tm More south & central american cichlidsFreshwater angelfishPterophyllum scalarePearl cichlidGeophagus brasiliensisSatanoperca leucostictaFalse yellowjacket cichlidParachromis motaguensisCrenicichla lenticulataCrenicichla lacustrisSee all south & central american cichlids SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026