is the caspian sea a lake
The Caspian Sea is the largest lake in the world by volume. It is also thought to be one of only a handful of ancient lakes on earth.It is generally believed that about 90 percent of all the world's sturgeons swim in the Caspian Sea.he Caspian Sea is the largest lake in the world by volume. It is also thought to be one of only a handful of ancient lakes on earth.