✦ Giant Squid (Architeuthis)
There are a total of eight species that fall into this category. On an average, males are about 30 to 33 feet (9 to 10 meters) long, while females are 40 to 43 feet (12 to 13 meters) long. Thus, females are bigger than males. Their eyes are as large as basketballs. They are known to be very fast swimmers.