Salmon are born in fresh water but then spend time in the ocean before returning home to spawn. So far, no one has been able to explain their remarkable ability to return to the same spot where they were born years before. In Celtic mythology, the salmon is credited with wisdom and sagacity. Dreaming of salmon is always a positive sign. It shows that you will overcome problems and achieve success. If you are living far away from your birthplace, it's a sign that you should return for a visit.