Rocio octofasciata

Rocio octofasciata — the Jack Dempsey Cichlid — has been a staple of the cichlid hobby since the early twentieth century and remains one of the most recognized freshwater fish worldwide. Native to Mexico, Guatemala, Honduras, and Belize, it inhabits slow-moving, warm lowland waters with murky conditions and dense vegetation. Despite its wide distribution, it tends toward turbid, vegetated backwaters rather than clear fast-flowing rivers.

Adults are breathtaking in breeding condition: hundreds of iridescent blue-green to turquoise scales spangle the body and fins against a dark background, and the gill covers take on an electric blue sheen. Males are larger, more colorful, and develop a rounded rather than pointed dorsal fin. Females have a more subdued pattern but still carry impressive blue scaling.

The species is a hardy aquarium fish tolerant of a wide range of water parameters, though it performs best in warm, soft to moderately hard water. It is a dedicated parent: pairs spawn on flat surfaces and both sexes aggressively guard the territory and young.

Water: 24–30°C, pH 6.5–8.0, GH 5–20, KH 2–10; adaptable but prefers slightly soft, warm water. Tank: 300 L minimum; flat rocks, caves, sand substrate; plants optional but often uprooted. Feeding: Carnivore — large cichlid pellets, earthworms, frozen mysis, shrimp; meaty diet essential. Breeding: Open substrate spawner on flat rocks; very aggressive pair defense; clutches of 500–800 eggs. Compatibility: Other large Central American cichlids; avoid small or delicate tankmates.