SIZE : An average of 1.4 m to 3 m, up to 4.6 m.
LIFE EXPECTANCY : Up to 60 years.
LIFE CYCLE : Sexual maturity, for St. Lawrence Atlantic sturgeon, is between 16 and 24 years for males and around 27 years for females.
In June and July, they migrate to freshwater, where currents are strong or near waterfalls. They spawn on gravelly substrates at depths between 1 m and 3 m. The species does not reproduce every year, but every 3 years or more.
The female can lay up to 4 million slightly sticky eggs. These attach themselves to the substrate and hatch after 3 to 7 days. The young remain in freshwater and migrate to saltwater when they reach a size of 80 cm to 120 cm.