© Shutterstock_DiveIvanov Large Eyed, Tubular Bodied Mollusks Squid are intelligent animals that thrive in every ocean worldwide, including the freezing polar regions. Diving with squid is always a treat, as their rhythmic movements and electric coloration can be captivating. There are roughly 300 different squid species ranging in size, from the tiny bobtail squid, reaching only 10 millimeters (0.4 inches), to the giant squid, which can grow up to 12 meters (39 feet). No matter where you go diving, spotting a shoal of squid is always a possibility. Squid is a fascinating mollusk species with many interesting characteristics. Special cells in their skin allow squid to change color at a moment’s notice. Squid have either 8 or 10 arms with two longer tentacles on the head-side of the body, a strong beak at their mouth opening used to kill prey, and can shoot black ink into the water when stressed as an escape mechanism. Check out the map below to see where you can go diving with squid.