Here is a coho salmon or silver salmon as some call them. They are, as I write this, being caught in Lake Michigan from boats and from the pier. They are Pacific salmon that were planted in the Great Lakes to devour the invasion of a trash fish called alewives.
The coho are still thriving although the alewives are fewer. Now they can feed on another invasive species, the gobi.
Read about coho salmon and other species of fish in my book, The Dynamic Great Lakes.