RIVER FISH · Ancient lake & river fish
Lake sturgeon
Acipenser fulvescens
A massive, long-lived bottom fish with bony scutes that uses large lakes and rivers and returns to flowing rocky habitat to spawn.
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Meet the fish
- Habitat
- Bottom habitat in large freshwater lakes and rivers, with spawning in swift rocky river reaches.
- On the menu
- Bottom-dwelling snails, crayfish, mussels, aquatic insects and occasional small fish or eggs, located with sensitive barbels.
- Size context
- USFWS describes typical adults around 4–6 feet and 30–80 pounds, with exceptional fish larger and far older.
- Range & local context
- Widely distributed in eastern and central North America, including Great Lakes, St. Lawrence and Mississippi-basin waters.
Living with the river
Water & habitat
Open passage, rocky substrate, current velocity and temperature are key spawning variables. A gauge can add context but cannot score habitat quality by itself.
Seasonal life
Mature fish migrate into rivers to spawn over gravel, cobble and boulders; they mature late and do not necessarily spawn every year.
Before you go
Lake sturgeon harvest is heavily regulated or prohibited in many waters. Always check local protection and reporting rules before fishing around them.
Use the linked agencies and the relevant river guide for current regulations, closures and consumption advisories. A species profile is not a fishing license or a statement that harvest is allowed.
Editorial review: . Regional size examples are labeled; maximum lengths are not typical sizes.
More river fish
Keep exploring species connected to the same river-guide network.