What does chum salmon mean in cooking?

chum salmon means: This salmon is the most delicately flavored and small in size of all the salmon varieties. It has the highest fat and color of any of the other salmon types. The “dog salmon”. “. (in Cooking Dictionary)

What else does chum salmon mean?

• Pacific salmon (Oncorhynchus keta) This fish is valued for its small specks and big teeth, which are used to spawn males. It’s also used as a game and food fish. (in Merlin Dictionary)