Electric Blue Jack Demsey
 
Natural Habitat
Environment: Slow-moving rivers, lakes, and muddy-bottomed streams with submerged logs and vegetation
Water Conditions: Soft to moderately hard water with stable parameters
Temperature Range: 24–30°C (75–86°F)
 
Physical Description
Body Shape: Deep-bodied and laterally compressed
Coloration: Vibrant iridescent blue with darker markings and a metallic sheen
Fins: Broad and flowing, often with electric blue highlights extending across the dorsal and caudal fins
 
Aquarium Care
Tank Size: Minimum 55 gallons for a single fish, 75+ gallons for a pair
Water Parameters:
pH: 6.5–7.5
Temperature: 24–30°C (75–86°F)
Water Flow: Moderate with good filtration
Substrate: Fine sand or smooth gravel
Décor: Driftwood, caves, and rock formations for shelter, along with sturdy plants like Anubias and Java Fern
Filtration: Strong filtration with regular water changes to maintain stable water quality
 
Diet
Type: Carnivorous/omnivorous
Preferred Foods: High-quality cichlid pellets, frozen or live foods (bloodworms, brine shrimp, earthworms), and occasional vegetables
Feeding Frequency: Feed once or twice daily in small portions
Behavior & Tank Mates
Temperament: Semi-aggressive but generally less territorial than standard Jack Dempseys
Compatible Tank Mates:
Medium to large South or Central American cichlids (like Severums, Firemouths, or Convicts)
Large catfish (Plecos, Synodontis)
Avoid small fish, as they may be seen as food
Behavior Notes: Intelligent and interactive, often recognizing their owners; can be territorial during breeding
 
Breeding
Spawning Method: Egg layers, typically laying eggs on flat surfaces like rocks or driftwood
Breeding Conditions:
Slightly warmer water (26–30°C) and high water quality encourage spawning
Pairs form strong bonds and exhibit parental care, guarding eggs and fry
Fry Care: Once hatched, fry can be fed baby brine shrimp and finely crushed flakes
 
Rocio octofasciata — Electric Blue Jack Dempsey
Family: Cichlidae
Origin: Central America (native form), selectively bred variant
Size: 20–25 cm (8–10 inches)
Lifespan: 10–15 years with proper care