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the giant squid (genus architeuthis) is a deep-ocean dwelling squid in the family architeuthidae. giant squid can grow to a tremendous size due to deep-sea gigantism: recent estimates put the maximum size at 13 m (43 ft) for females and 10 m (33 ft) for males from the posterior fins to the tip of the two long tentacles (second only to the colossal squid at an estimated 14 m (46 ft),[2] one of the largest living organisms). the mantle is about 2 m (6.6 ft) long (more for females, less for males), and the length of the squid excluding its tentacles (but including head and arms) rarely exceeds 5 m (16 ft). claims of specimens measuring 20 m (66 ft) or more have not been scientifically documented.the number of different giant squid species has been debated, but recent genetic research suggests that only one species exists.in 2004 japanese researchers took the first images of a live giant squid in its natural habitat, and in july 2012 a live adult was first filmed in its natural habitat off chichi-jima.