Did you ever go fishing? Did you ever catch a ? I doubt it. It takes a sharp fisherman to catch me.  
I am called "the king of the fresh water fish." I am the most valuable and delicate of all fish. My flavor is excellent and I have few troublesome bones.
 
My home is in the sea. But in the autumn of the year I leave it and travel to the river where I was born. There I deposit eggs in the shallow . The eggs remain there until the next spring. Then the............