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When do sturgeons migrate into rivers to spawn?
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chondrostean
Russian sturgeon (Acipenser gueldenstaedtii) swimming along the seafloor of the Black Sea.
Sturgeons typically migrate from the sea into rivers or toward the shores of freshwater lakes to spawn during the spring or summer months. While many species follow this pattern, some sturgeons are confined entirely to fresh water and still undertake migrations to reach their habitual spawning grounds.12