Bala Shark Size and Care: Tank Size and School Needs
Published: 2026-10-28 · FishyKart Blog
Despite the name, the bala shark (Balantiocheilos melanopterus) is not a shark at all but a large, peaceful member of the carp and minnow family from Southeast Asia, named for its tall dorsal fin and silver, torpedo-shaped body. The fish sold as 2-3 inch juveniles commonly grow to 10-14 inches in aquariums, live 10 years or more, and swim in schools. That adds up to a very long tank, 125 gallons at the absolute minimum and closer to 230 gallons by Seriously Fish's guidance, for a group of adults.
Photo: Fish-Hed - Wikimedia Commons, CC BY-SA 3.0
| Parameter | Value |
| Scientific name | Balantiocheilos melanopterus |
| Family | Cyprinidae (carps and minnows) |
| Origin | Rivers and lakes of Southeast Asia |
| Adult size | 10-14 in in aquariums |
| Lifespan | Long-lived; 10+ years often reported |
| Temperature | 72-82°F (22-28°C) |
| pH | 6.5-8.0 |
| School size | 5 or more |
| Minimum tank | 125 gallons absolute minimum; about 230 gallons (8 x 2 ft) recommended |
The Size Problem
Bala sharks are among the most commonly outgrown fish in the hobby. A juvenile looks right in a 20 gallon tank, but it grows several inches a year with good food. By the time it is a foot long, it needs a tank at least 6 feet long, ideally 8, because bala sharks are fast swimmers that need length to turn and cruise. If you do not have room for a tank of 125 gallons or much larger, choose a different fish.
Why They Need a School
Alone, bala sharks are nervous: they dart, crash into the glass when startled and hide. In a group of five or more they settle, swim openly and show their typical behaviour. That multiplies the space needed, which is another reason they suit only very large aquariums or ponds in warm climates.
Jumping and Tank Covers
Bala sharks are strong jumpers, especially when frightened. A tight lid is essential. Keep the tank in a quiet spot and avoid sudden lights or movement around the tank at night.
Feeding
Bala sharks are omnivores. Feed quality flakes or pellets, plus frozen or live foods such as bloodworms and brine shrimp, and some vegetable matter. Feed two or three times a day in small amounts.
Tank Mates
Bala sharks are peaceful with fish of similar size: rainbow sharks in very large tanks, larger barbs, clown loaches, gouramis and peaceful catfish. Small fish such as neon tetras will eventually be eaten.
Large community fish are listed in our live fish collection.