Heros severus — Blue Severum Cichlid
Family: Cichlidae
Origin: Amazon River Basin, South America
Size: 20–25 cm (8–10 inches)
Lifespan: 10–15 years with proper care
 
Natural Habitat
Environment: Slow-moving rivers, backwaters, and floodplain lakes with submerged roots and overhanging vegetation
Water Conditions: Soft to moderately hard water, slightly acidic to neutral pH
Temperature Range: 24–28°C (75–82°F)
 
Physical Description
Body Shape: Deep-bodied and laterally compressed
Coloration: Metallic blue with subtle green and turquoise hues, often with faint vertical barring
Fins: Broad and rounded, with an iridescent sheen and occasional red or orange accents on the edges
 
Aquarium Care
Tank Size: Minimum 55 gallons for a single fish, 75+ gallons for a pair
Water Parameters:
pH: 6.0–7.5
Temperature: 24–28°C (75–82°F)
Water Flow: Moderate, with clean and well-oxygenated water
Décor: Sand or fine gravel substrate, driftwood, smooth rocks, and hardy plants like Anubias and Java Fern
Filtration: Strong filtration with regular water changes to maintain water quality
 
Diet
Type: Omnivorous
Preferred Foods: High-quality cichlid pellets, vegetables (spinach, zucchini, peas), and protein sources like shrimp, earthworms, or bloodworms
Feeding Frequency: Feed once or twice daily in small portions
 
Behavior & Tank Mates
Temperament: Generally peaceful but can be territorial, especially during breeding
Compatible Tank Mates:
Other medium-sized South American cichlids (such as Festivum or Uaru)
Peaceful catfish (like Plecos or Corydoras)
Larger tetras, silver dollars, or other robust schooling fish
Behavior Notes: Intelligent and interactive, often recognizing their owners and responding to feeding times
 
Breeding
Spawning Method: Substrate spawners, typically laying eggs on flat surfaces like rocks or driftwood
Breeding Conditions:
Slightly warmer water (26–28°C) and frequent water changes can trigger spawning
Pairs form strong bonds and exhibit parental care, guarding eggs and fry
Fry Care: Once hatched, fry can be fed baby brine shrimp or finely crushed flake food