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 ...

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 ...

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 ...