The San Francisco Bay-Delta and Sacramento-San Joaquin river system are home to a rare, enormous species of living fossil called the green sturgeon. The ancient fish has survived unchanged for almost ...

The green sturgeon (Acipenser medirostris) is a species of concern due to its declining populations and the threats it faces from habitat loss, pollution, and climate change. Understanding the ...

These organs, called barbels, help the fish to locate bottom-dwelling prey, such as snails, mussels, clams, crayfish, insect larvae, and fish eggs. Also known as the rock sturgeon, the lake ...