Red Mahseer (Tor sinensis)

Red Mahseer — Tor sinensis

River muscle with flashes of crimson

The Red Mahseer is a powerful, high-current cyprinid known for its endurance and bold coloration. A polished silver to bronze body is accented by deep red to crimson tones along the fins — especially the tail and pectorals — creating a sharp contrast when the fish turns in strong flow. Thick scales, a broad head, and a deeply forked tail reveal its true nature: a river athlete built for movement.

Native to large, fast-flowing river systems in China and surrounding regions, Tor sinensis thrives in oxygen-rich water with steady current. Unlike ambush predators, the Red Mahseer is a constant cruiser, patrolling open lanes with strength and stamina. When kept in groups, they move in coordinated bursts, bringing energy and scale to large aquariums or indoor pond systems.

Growing to 24–36+ inches in proper conditions, this species requires serious space and filtration. It is best suited for experienced keepers with large river-style setups.

Aquarium Setup

• Minimum Tank Size: 300 gallons (8 ft+ length recommended; pond setups ideal long-term)

• Substrate: Sand, smooth gravel, or river rock

• Flow: Moderate to strong current

• Décor: Open swimming lanes with rock structure along edges

• Lighting: Moderate to bright (enhances silver and red contrast)

• Cover: Secure lid required — strong jumper

• Filtration: Oversized biological filtration essential

• Oxygen: High dissolved oxygen critical

Tank Mates

Best with other large, fast, confident species:

• Large barbs

• Datnoids

• Arowana (space dependent)

• Large catfish

• Robust riverine fish

Avoid slow, delicate species and small fish.

Water Parameters

• Temperature: 68–75°F (20–24°C)

• pH: 6.5–7.5

• Hardness: Moderate

• Water Quality: Pristine, well-oxygenated water essential

Diet

Omnivorous with strong appetite:

• High-quality large pellets

• Shrimp and prawn

• Insects

• Occasional vegetable matter