Silver Shark, Bala Shark (Balantiocheilos melanopterus) — 5-6cm

Overview

The Silver Shark, also known as the Bala Shark and scientifically as Balantiocheilos melanopterus, is a sleek, peaceful schooling fish from Southeast Asia that brings elegance and dynamic movement to large aquariums. Available for aquarium fish UK, this species reaches up to 30cm in length and requires a spacious tank of at least 600 litres to accommodate its size and active schooling behaviour. With its striking silver body and black-edged fins, the Silver Shark is a favourite among aquarists seeking a peaceful, large community fish that thrives in groups and adds visual impact to spacious setups.

Appearance

The Silver Shark is a large, streamlined cyprinid with a torpedo-shaped body and brilliant silver scales that shimmer under aquarium lighting. The most distinctive feature is the bold black edging on all fins, creating a striking tricolor effect that gives the species one of its common names, the tricolor shark. The fins are large and well-developed, and the caudal fin is deeply forked, giving the fish a powerful, graceful swimming motion. Despite the common name, this species is not a true shark but a member of the minnow family. Overall, the Silver Shark is a visually stunning fish that adds elegance and movement to large community aquariums.

Natural Habitat

Native to Southeast Asia, the Silver Shark is found in river systems of Thailand, Malaysia, Sumatra, and Borneo. In the wild, these fish inhabit fast-flowing rivers and streams with rocky or sandy substrates and plenty of open water for swimming. They are schooling fish that move in groups, foraging for food among rocks and vegetation. The water is typically warm, well-oxygenated, and neutral to slightly acidic. Bala Sharks are powerful swimmers that require plenty of space and current in the aquarium to replicate their natural environment and maintain optimal health.

Aquarium Setup

A minimum tank size of 600 litres is essential for adult Silver Sharks, with larger tanks recommended if keeping them in schools as intended. Use a substrate of sand or fine gravel, and provide plenty of open swimming space with minimal obstructions. Include some robust plants, driftwood, and smooth rocks to create visual interest, but leave large open areas for swimming. Use a tight-fitting lid or cover, as these fish are powerful jumpers, especially when startled. Filtration must be robust to maintain excellent water quality and provide moderate water movement. Perform weekly water changes of 30-40% and maintain stable, well-oxygenated water. Subdued lighting will reduce stress and encourage more confident behaviour.

Feeding

Silver Sharks are omnivores that thrive on a varied diet. Offer a staple of quality flakes or pellets formulated for large omnivorous fish, supplemented with frozen or live foods such as bloodworms, brine shrimp, daphnia, and chopped earthworms. Include regular vegetable matter or algae-based foods such as spirulina flakes or blanched vegetables to support digestive health. Feed twice daily in portions that can be consumed within a few minutes, and vary the diet to ensure balanced nutrition. A varied diet will enhance coloration, support immune function, and maintain the sleek, streamlined body shape that makes this species so attractive.

Behaviour

The Silver Shark is a peaceful, active schooling fish that thrives in groups of at least five individuals. In a proper school, these fish display confident, lively behaviour, swimming actively throughout the aquarium in tight formation. They are non-aggressive and make excellent community fish, coexisting peacefully with other large, peaceful species. Silver Sharks are most active during the day and often patrol the mid-to-upper levels of the aquarium. Keeping them in a proper group is essential for their well-being, as solitary individuals or small groups become shy, stressed, and prone to jumping.

Tank Mates

Choose tankmates carefully to ensure compatibility with these large, peaceful fish. Suitable companions include other peaceful medium to large community fish, large tetras, rainbowfish, barbs of similar size and temperament, and gouramis. Avoid small fish that may be eaten, very slow or long-finned fish, aggressive territorial fish, fin-nipping species, and tiny shrimp and small invertebrates. The Silver Shark is an ideal inhabitant for large peaceful community aquariums and thrives alongside other active, similarly sized fish in spacious setups.

Breeding

Breeding Silver Sharks is uncommon in home aquariums and usually requires very large tanks and excellent water quality. Commercial breeding is typically done with hormone-assisted methods. In the rare instances where spawning occurs in home aquariums, the fish scatter eggs over substrate or plants, and the eggs hatch in 24-48 hours. Fry are extremely small and require infusoria and newly hatched brine shrimp. Due to the large size and specific requirements of this species, breeding is generally beyond the scope of most hobbyists.

Why Buy from Tropical Fish Co

Tropical Fish Co is a leading supplier of tropical fish for sale UK, offering healthy, well-conditioned Silver Sharks sourced from reputable breeders and quarantined for quality assurance. We provide expert guidance on bala shark tank mates, tank setup, water chemistry, and compatible tankmates to help you create a thriving large community aquarium. With secure packaging, reliable buy tropical fish online UK delivery, and a commitment to customer satisfaction, Tropical Fish Co makes it easy to buy fresh water fish UK with confidence. Whether you're building your first large community tank or adding to an established collection, our knowledgeable team is here to support your success.