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 for females and for males from the posterior fins to the tip of the two long tentacles (second only to the colossal squid at an estimated , one of the largest living organisms). The mantle is about long (more for females, less for males), and the length of the squid excluding its tentacles (but including head and arms) rarely exceeds . Claims of specimens measuring or more have not been scientifically documented.