Probably one of the most well known cephalopods The giant squid is a deep-ocean dwelling Squid in the family Architeuthidae, represented by as many as eight species. Giant squid can grow huge: recent estimates put the maximum size at 13 metres (43 ft) for females and 10 metres (33 ft) for males, although 60-100 ft length is possible too. They are the second largest cephalopod on earth. Their sole predator is the sperm whale. Humboldt Squid Cuttlefish 'Colossal Squid' Japanese Flying Squid