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A dramatisation of an underwater encounter between the sperm whale and giant squid, from a diorama at the American Museum of Natural History. More extreme and outlandish giant squid size claims—belonging firmly in the realm of cryptozoology—have appeared in the works of authors such as Bernard Heuvelmans, Willy Ley, and Ivan T. Sanderson. [126]
Size comparison with a human. Unlike most squid species, the colossal squid exhibits abyssal gigantism, as it is the heaviest living invertebrate species, reaching weights up to 495 kg (1,091 lb). [3] For comparison, squids typically have a mantle length of about 30 cm (12 in) and weigh about 100–200 g (3 + 1 ⁄ 2 –7 oz). [10]
The arms are thick and capable; the fins vary in shape and size, from sagittate and about 50% of the mantle length, to reniform and about 30% of the mantle length. Of moderate size, these squid range in size from 11 to 40 cm—most species are 25 cm or less. Females are somewhat larger than males.
Marine Patch says that they can dive 2,000 meters, or about 6,200 feet for up to two hours while hunting giant squid, sharks, skates, and fish. "Squid just so happens to be the sperm whales ...
Extant cephalopods range in size from the 10 mm (0.3 in) Idiosepius thailandicus [4] to the 700 kilograms (1,500 lb) heavy colossal squid, the largest extant invertebrate. [ 5 ] [ 6 ] Distribution
Apart from two partial specimens (#2 and 3) recovered from sperm whale stomachs in the mid-1950s—initially misidentified as belonging to the giant squid genus, Architeuthis [2] —and a single juvenile individual of 86 mm (3.4 in) mantle length , [3] little else was known about the species until additional specimens began receiving coverage ...
The egg size can range from 0.75 to 0.9 mm, and the hatchling size has a mantle length of approximately 1.0 mm. [6] Purpleback squids are among the fastest-growing squid species, as the daily increase of overall length in the dwarf and middle-sized forms is about 1.0 mm; for the giant form, it is about 3.8 mm. [6]
The size of a fully grown O. ingens, inclusive of tentacles, is currently unknown. Many estimates, however, predict that the mantle may reach lengths of up to 94 cm (37 in). Research has found that egg sizes of the squid average 2.1 mm inside mature females, while juveniles average 4.6 mm or larger.