The North Pacific hake, Pacific hake, Pacific whiting, or Jack Salmon, Merluccius productus, is a ray-finned fish in the genus Merluccius, found in the northeast Pacific Ocean from northern Vancouver Island to the northern part of the Gulf of California. It is a silver-gray fish with black speckling, growing to a length of 90 cm (3 ft). It is a migratory offshore fish and undergoes a daily vertical migration from the surface to the seabed at depths down to about 1,000 m (3,300 ft). It is the object of an important commercial fishery off the West Coast of the United States, and annual quotas are used to prevent overfishing. An expansion of the range of the Humboldt squid is causing concern because it is a voracious predator of the North Pacific hake.