How do eels find their way back to their homes?

Eels, particularly the European eel (Anguilla anguilla) and the American eel (Anguilla rostrata), use a combination of environmental cues and sensory mechanisms to navigate back to their spawning grounds. They rely on the Earth's magnetic field, water currents, and chemical cues, such as salinity gradients, to guide their journey. Additionally, eels have an Excellent sense of smell that helps them detect specific scents associated with their home waters. This remarkable navigation ability allows them to travel thousands of miles from their feeding grounds to their breeding sites in the Sargasso Sea.