Jumbo Squid, Atlantic Ocean, 2004Photograph by Brian J. SkerryWith an angry eye and a cloud of ink, a jumbo squid (Dosidicus gigas) flees from a diver. If camouflage fails, squid use ink as a backup defense. Mexican fishermen call the aggressive creatures "diablos rojos"—red devils. They often spew water from their funnels when hauled aboard.