Rainbow Shark

The a bold and active freshwater fish recognised for its dark body and striking red fins. Despite its name, it is not a true shark, but its streamlined shape and territorial nature give it a strong presence in the aquarium.

s are best suited to larger, well-structured tanks where they can establish territories without constant conflict. When housed correctly, they are hardy, long-lived, and make an impressive feature fish for semi-aggressive freshwater setups.

Physical Characteristics:

Adult Size: 12–15 cm

Body Shape: Streamlined, shark-like profile

Colouration: Dark grey to black body with vivid red fins

Sexual Dimorphism: Minimal; females may appear slightly fuller-bodied

Lifespan: 5–8 years

Behaviour & Temperament:

Temperament: Semi-aggressive

Swimming Level: Bottom to mid levels

Territorial Behaviour: Strong, especially toward similar-shaped fish

Social Behaviour: Best kept singly

s become increasingly territorial as they mature and should not be housed with other sharks or similar bottom-dwelling species.

Aquarium Requirements:

Minimum Tank Size: 120 litres

Water Temperature: 22–28°C

pH Range: 6.5–7.5

Water Hardness: 5–15 dGH

Water Flow: Moderate

Substrate: Sand or smooth gravel

Aquascape: Driftwood, rocks, caves, and broken sight lines

Tank Cover: Recommended

Feeding:

s are omnivorous and require a varied diet:

Sinking pellets or wafers

Algae wafers

Blanched vegetables (zucchini, spinach)

Frozen foods (bloodworms, brine shrimp)

Feed once daily and avoid overfeeding.

Compatibility:

Suitable Tank Mates:

Large tetras

Rainbowfish

Barbs (non fin-nipping species)

Gouramis

Fast mid-to-upper level fish

Avoid Housing With:

Other sharks or loaches

Corydoras and other bottom dwellers

Slow or long-finned fish

Small, timid community species

Breeding:

Breeding in Captivity: Extremely rare

Commercial Breeding: Hormone-assisted

Notes: Not suitable for home breeding

Special Considerations:

Must be kept singly

Territorial behaviour increases with age

Requires space and hiding areas to reduce aggression

Not suitable for small or peaceful community aquariums

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