巨乌贼（属名：Architeuthis，英文名：Giant squid），通常栖息在深海地区，主要产于北大西洋和北太平洋。是体型次大的无脊椎动物，仅次于大王酸浆鱿，身长估计约10至13公尺，是目前已知的第二大软件动物和无脊椎动物。

在过去以来，曾被认为是一种传说中的生物 (克拉肯，Kraken)。由于巨乌贼的活动领域在海中，人们对巨乌贼多半只能从其天敌抹香鲸胃中未消化的残骸中和渔民们口耳相传的目睹事件中拼凑猜测其生态，对于某些生物学家而言是绝对存在的。

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), 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.