You could spend months researching this and expand it into a Masters' Thesis. Start by looking at the Humboldt Squid. A Tropical species, up until recently found from Mexico to Peru. A few years back they started pulling them up in Monterey Bay. The "Experts" said it was El Nino that allowed them to move north. Well, now they're being caught off the coast of British Columbia. They're huge, 2 M long, and strong enough to pull a Mexican fisherman under. They could decimate an ecosystem. A creature of mystery; little is known about them because they move quickly and spend the daytime at great depth.

You go, Girl!