Coho salmon are also known as Silver salmon due to their bright silvery coloring. They can be differentiated from chinook by their gray gums and a lack of black spots on the lower lobe of the tail. Coho migrate starting in July, with spawning in late October through January. After hatching, coho fry prefer areas of calm water such as beaver ponds, lakes and pools with plenty of large woody debris where they will stay for up to two years. The coho in WRIA 1 are a candidate for endangered species listings, but are not listed as threatened yet.