As far as scientists can tell, all American and European freshwater eels are born in or near the seaweed-filled Sargasso Sea, in the Bermuda Triangle. After hatching, the baby eels leave the Sargasso and start swimming. They don’t stop until they reach their destination. That destination could be a river in Iowa or a river in Germany. The journey to Europe can take a glass eel two or three years to complete. Relative to body size, it’s the equivalent of a human swimming to the moon.
