Channa argus Breeding Guide
Why Channa argus must not be bred or kept where illegal: a highly invasive temperate snakehead in which a female can lay 100,000 eggs a year and parents guard the brood.
Overview
Channa argus, the northern snakehead, is a large temperate snakehead native to East Asia, with a natural range from the Amur River watershed in Siberia and Manchuria down to Hainan, across China, Russia, North Korea and South Korea. It generally reaches up to 100 cm, with specimens approaching 150 cm known. It is a facultative air breather able to survive out of water and move overland.
Spawning Behavior & Trigger
The species reaches sexual maturity at age three or four, when it is about 30 to 35 cm long. A female can lay 100,000 eggs a year, and fertilization occurs in shallow water in the early morning. This very high reproductive output is a major reason the species is so damaging where introduced.
Egg & Fry Care
The eggs are yellow and spherical, about 2 mm in diameter, and hatch after about 1-2 days, though this can take much longer at lower temperatures. The eggs are guarded by the parents until egg absorption, when the larvae are about 8 mm long.
Breeding Setup
- Sexual maturity at age 3-4 (about 30-35 cm)
- Eggs yellow, spherical, about 2 mm in diameter
- Hatching in about 1-2 days, longer in cold water
- Native temperate East Asia; tolerates very cold water
Common Challenges
The decisive issue is legal and ecological rather than technical: in jurisdictions where this species is banned, keeping or breeding it is unlawful, and its prolific reproduction and overland mobility make any escape a serious threat to native ecosystems.