Bala Shark

Bala Shark (Balantiocheilos melanopterus) is one of the most beloved and most frequently mishoused freshwater fish in the hobby. The silver body with black-edged yellow fins and the elegant, streamlined shark-like profile create a fish of genuine beauty and presence — and one that is IUCN Endangered, with wild populations that have collapsed catastrophically due to habitat destruction and overcollection across Southeast Asia.

Feeding & Care Tip: Sera Vipan Tropical Flakes and Hikari Micro Pellets make excellent daily staples. Supplement with Hikari Frozen or Freeze-Dried Brine Shrimp and Hikari Frozen or Freeze-Dried Bloodworms 2–3 times per week. Active mid-water feeders that eat from all levels.

⚠ Size Warning: Bala Sharks grow to 14 inches (35 cm) and must be kept in groups of at least five, requiring a minimum of 150 gallons for an adult school. They are commonly sold as small juveniles but grow quickly. Plan ahead.

Historically native to the Mekong, Chao Phraya, and Malay Peninsula river systems. Wild populations have declined severely — the species has essentially vanished from large parts of its historical range. All aquarium stock is captive-bred. The genus name Balantiocheilos means 'purse-lip' in Greek.

Bala Sharks are schooling fish that must be kept in groups of at least five — solitary or small groups of Bala Sharks are anxious, dash into glass, and decline. A proper school calms dramatically and behaves naturally. The schooling behavior is one of the most impressive in the hobby — a school of large Bala Sharks moving in formation is a remarkable sight. They are also extraordinary jumpers — a tight-fitting lid is essential.

The commitment to Bala Sharks is significant — a school of adults needs a 150+ gallon aquarium. Juveniles are sold at 2–3 inches and are irresistible, but they grow steadily to 14 inches. The IUCN Endangered status makes responsible keeping of captive-bred stock all the more meaningful.

Care & Ideal Parameters