The giant squid (genus Architeuthis) is a deep-ocean dwelling squid in the family Architeuthidae, represented by as many as eight species. Giant squid can grow to a tremendous size: recent estimates put the maximum size at 13 meters (43 ft) for females and 10 metres (33 ft) for males from caudal fin to the tip of the two long tentacles (second only to the Colossal Squid at an estimated 14 meters (46 ft), one of the largest living organisms). The mantle is about 2 meters (6.6 ft) long (more for females, less for males), and the length of the squid excluding its tentacles is about 5 meters (16 ft).There have been claims reported of specimens of 20 metres (66 ft) or more, but no animals of such size have been scientifically documented.
On September 30, 2004, researchers from the National Science Museum of Japan and the Ogasawara Whale Watching Association took the first images of a live giant squid in its natural habitat. Several of the 556 photographs were released a year later. The same team successfully filmed a live adult giant squid for the first time on December 4, 2006.