An aggressive predator, the Humboldt squid—or Dosidicus gigas—can change its eating habits to consume the food supply favored by tuna and sharks.
Before the 1970s, the giant squid were typically found in the Eastern Pacific, and in coastal waters spanning from Peru to Costa Rica. But as the populations of its natural predators—like large tuna, sharks and swordfish—declined because of fishing, the squids moved northward and started eating different species that thrive in colder waters.
