Meet the Frankenfish: A Northern Snakehead Species Profile

The northern snakehead (Channa argus) is native to East Asia and was first documented reproducing in U.S. waters in the early 2000s. Its combination of biology and behavior is exactly what makes it both a thrilling gamefish and a serious invasive concern.

Built to survive

Snakehead have a suprabranchial organ that lets them breathe air, so they can survive in low-oxygen swamps and even wriggle short distances over wet ground. They tolerate a wide range of temperatures and water conditions.

Apex ambusher

Elongated body, big mouth, sharp teeth, and a long dorsal fin — snakehead ambush fish, frogs, and crayfish from cover. Adults commonly reach 2–3 feet and can top 15 pounds.

Devoted parents

Both parents guard a bright orange ball of fry, aggressively attacking anything that approaches — which is why casting to a "fry ball" is such a reliable tactic.

Why it matters

As a voracious, adaptable predator with no natural controls here, the northern snakehead can pressure native fish. That's why wildlife agencies ask anglers to harvest, not release. The upside: they're excellent to eat, so removal and dinner go hand in hand.