Red Body Tonkin Bitterling (Acheilognathus tonkinensis “Red Body”) – Vibrant Freshwater Jewel

The Red Body Tonkin Bitterling is a striking freshwater fish native to the river systems of northern Vietnam and southern China. Known for its vivid red body contrasting with delicate fins, this peaceful species brings a splash of color to planted aquariums. Its fascinating reproductive cycle involves laying eggs inside freshwater mussels, where the young safely develop before swimming freely.

Features

• Size: Typically grows to about 7 cm (2.7 inches) in length.

• Origin: Rivers and streams of northern Vietnam and adjacent areas of China.

• Coloration: Bright red body with subtle fin coloration, especially prominent in breeding males.

• Behavior: Peaceful and social; thrives in groups.

Care Instructions

• Tank Setup: A well-planted aquarium with moderate water flow and clean substrate is ideal.

• Water Parameters: Temperature between 18–24 °C, pH around 6.5 to 7.5, soft to moderately hard water.

• Social: Keep in groups of 6 or more to ensure natural social behavior and enhance color vibrancy.

• Breeding: Requires freshwater mussels for spawning; females deposit eggs inside mussel gills for protection.