Salmon sharks are opportunistic feeders. This means that they will eat just about anything that they can catch. Because the salmon sharks are fast and can tolerate a wide range of temperatures in the water, they can move around for their prey. They are named after their favorite prey, the Pacific salmon. But apart from the salmon, these sharks will also eat other kinds of herring fish, squid, steelhead trout, sardines, codfish, lanternfishes, pomfrets, mackerel, and many others. They may even migrate for food, following the migration patterns of their preferred prey. This shark's salmon-eating instincts are so strong that it will follow the salmon as it swims through the ocean to reach the rivers, from Baja California to the Gulf of Alaska