Description:
The Blue Severum is a captivating freshwater fish belonging to the cichlid family (Cichlidae). While the exact scientific name can sometimes be debated and may refer to different, closely related species within the Heros genus, it is often associated with Heros efasciatus or potentially Heros severus in some regions, especially when referring to wild-caught variants with a more pronounced blue coloration.
Origin:
Blue Severums are native toSouth America, primarily found in the Amazon River basin and its tributaries. Some specific locations mentioned include the Rio Negro. They inhabit slow-moving waters with dense vegetation and submerged structures.
Appearance:
- They exhibit a beautiful metallic blue body that shimmers under aquarium lighting.
- Faint vertical banding may be present and can become more pronounced depending on the fish's mood and age.
- Some individuals may display chocolate brown spots and subtle purple or green hues.
- Adults can reach up to 20-25 cm (8-10 inches) in length.
Tank Requirements:
- A spacious tank is necessary, with aminimum of 200 liters (53 gallons) recommended for a single adult. Larger tanks are preferable, especially if keeping multiple Severums or tank mates. Some sources suggest an even larger tank, around 450 liters (119 gallons), is ideal for adults.
- A soft, sandy substrate is preferred.
- Provide plenty of hiding places using driftwood, rocks, and sturdy plants. Hardy plants like Java Fern and Anubias that can be attached to decorations are recommended as Severums may uproot or eat softer plants.
- Maintain a water temperature between 24-28°C (75-82°F) and a pH range of 6.0-7.5.
- Consistent filtration and regular weekly water changes (25-30%) are crucial for maintaining pristine water quality.
Temperament:
- Blue Severums are generally considered peaceful to moderately aggressive compared to many other cichlid species.
- They can be kept in community tanks with other medium to large, non-aggressive fish such as Silver Dollars, Angelfish, Plecos, and some larger tetras or peaceful South American cichlids.
- Avoid housing them with overly aggressive or very small fish.
- They can be territorial, especially during breeding. Providing ample space and hiding spots helps minimize aggression.
Diet:
- Blue Severums are omnivores and require a varied diet for optimal health and color.
- Offer a high-quality cichlid pellet or flake as a staple food.
- Supplement their diet with live or frozen foods like brine shrimp, bloodworms, and daphnia.
- Include blanched vegetables such as spinach, peas, and zucchini to aid digestion and enhance their natural colors.
Breeding:
- Breeding Blue Severums in a home aquarium is achievable.
- It's often best to start with a group of juveniles and allow them to pair naturally.
- Males may develop a slight nuchal hump and have longer, more pointed fins than females.
- They are substrate spawners, laying their eggs on flat surfaces like rocks or plant leaves.
- Both parents exhibit strong parental care, guarding the eggs and fry.
- Maintain stable water conditions and provide smooth surfaces to encourage spawning.
- Feed the fry finely crushed flakes or baby brine shrimp.
