The giant squid is a cephalopod species native to the deep sea. They are elusive and rarely observed alive, but are famous for their immense size, growing up to 43 ft (13 m) in length and weighing up to 606 lb (275 kg). Indeed, the giant squid is one of the largest known invertebrate species living today, second only to the colossal squid. There is some debate about the number of different species of giant squid. However, the most recent genetic evidence suggests that there is only one known species, Architeuthis dux.