Giant squid

Species
Architeuthis dux
Architeuthis hartingii
Architeuthis japonica
Architeuthis kirkii
Architeuthis martensi
Architeuthis physeteris
Architeuthis sanctipauli
Architeuthis stockii

Giant squids, once believed to be mythical creatures, are squid of the Architeuthidae family, represented by as many as eight species of the genus Architeuthis. They are deep-ocean dwelling squid that can grow to a tremendous size: recent estimates put the maximum size at 10 m (34 ft) for males and 13 m (44 ft) for females from caudal fin to the tip of the two long tentacles (second only to the Colossal Squid at an estimated 14 m, one of the largest living organisms). The mantle length, though, is only about 2 m (7 ft) in length (more for females, less for males), and the length of the squid excluding its tentacles is about 5 m (16 ft). There were reported claims of specimens of up to 20 m (66 ft), but none had 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 live giant squid in their natural habitat. The photos were released a year later.

Biology

A piece of Sperm Whale skin with giant squid sucker scars

Despite their great length, giant squid are not particularly heavy when compared to their chief predator, the Sperm Whale, because the majority of their length is taken up by their eight arms and two tentacles. The weights of recovered specimens have been measured in hundreds, rather than thousands, of kilograms. Post-larval juveniles have been discovered in surface waters off New Zealand, and there are plans to capture more such juveniles and maintain them in an aquarium in an attempt to learn more about the creature's biology and habits.

The reproductive cycle of the giant squid is still a great mystery, but what has been learned so far is both bizarre and fascinating; male giant squid are equipped with a prehensile spermataphore-depositing tube, or Hectocotylus, of over 90 cm (three feet) in length, which extends from inside the animal's mantle and apparently is used to inject sperm-containing packets into the female squid's arms — how exactly the sperm then is transferred to the egg mass is a matter of much debate, but the recent recovery in Tasmania of a female specimen having a small subsidiary tendril attached to the base of each of its eight arms could be a vital clue in the solution of this enigma.

Carcass of giant squid collected from northeast Newfoundland in the 1960s.

Giant squid possess the largest eyes of any living creature ever, over 30 cm (one foot) in diameter, and their arms are equipped with hundreds of suction cups in total; each is mounted on an individual "stalk" and equipped around its circumference with a ring of sharp teeth to aid the creature in capturing its prey by firmly attaching itself to it both by suction and perforation. The size of these suction cups can vary from 2 to 5 cm in diameter (one to two inches), and it is not uncommon to find their circular scars on the head area of sperm whales that have fed — or attempted to feed — upon giant squid. The only other known predator of the adult giant squid is the Pacific sleeper shark, found off Antarctica, but it is not yet known whether these sharks actively hunt the squid, or are simply scavengers of squid carcasses. Because sperm whales are skilled at locating giant squid, scientists have attempted to conduct in-depth observations of sperm whales in order to study squid.

One of the more unusual aspects of giant squid (as well as some other species of large squid) is their reliance upon the low density of ammonia in relation to seawater to maintain neutral buoyancy in their natural environment, as they lack the gas-filled swim bladder that fish use for this function; instead, they use ammonia (in the form of ammonium chloride) in the fluid of their flesh throughout their bodies. This makes the giant squid unfit for human consumption, although sperm whales seem to be attracted by (or are at least tolerant of) its taste.

Like all cephalopods they use special organs called statocysts to sense their orientation and motion in the water. The age of giant squids can be estimated by "growth rings" in the statocyst's "statolyth" much like counting tree rings. Much of what is known about these animals come from estimates based on these, and from undigested beaks found in sperm whale stomachs.

Timeline

Sketch of giant squid in Glover's Harbour Newfoundland in 1878 The Alecton attempts to capture a giant squid in 1861

Japetus Steenstrup produced a number of papers on giant squid in the 1850s. He first used the term "Architeuthis" in a paper in 1857. A portion of a giant squid was secured by the French gunboat Alecton in 1861 leading to wider recognition of the species/genus in the scientific community. Between 1870 and 1880, large numbers of strandings occurred on the shores of Newfoundland. For example, a specimen washed ashore in Glover's Harbour, Newfoundland on November 2, 1878 was 6.1m (20 ft) long (mantle length), and one of its tentacles measured 10.7m (35 ft) long and it was estimated as weighing 2.2 tonnes. In 1873 a squid "attacked" a minister and a young boy in a dory in Bell Island, Newfoundland.

Large numbers of strandings also occurred in New Zealand during the late nineteenth century. Although strandings continue to occur sporadically throughout the world, the high frequency of strandings at Newfoundland and New Zealand in late nineteenth century have not yet been repeated. It is not known exactly why giant squid become stranded on shore, but it is possible that a periodic though temporary alteration of the distribution of the deep, cold water where the squid live might be the cause. Many scientists who have studied squid mass strandings believe that they are cyclical and predictable, but the length of time between strandings is not yet known. A period of 90 years between mass strandings has been proposed by Frederick Aldrich, an Architeuthis specialist, who used this value to correctly predict a relatively small stranding that occurred between 1964 and 1966. By and large, however, squid strandings remain a mystery.

The search for a live Architeuthis specimen includes attempts to find live young, including larvae. Larval Architeuthis closely resemble larvae of Nototodarus and Moroteuthis, with distinctive characteristics being the shape of the mantle attachment by the head, the tentacle suckers, and the beaks. Approximately 65 specimens, one-fifth of all the giant squid ever found, have been found in the waters off Newfoundland; the last in December 2004.

A photo of a live giant squid

On September 30, 2004, Tsunemi Kubodera (National Science Museum of Japan) and Kyoichi Mori (Ogasawara Whale Watching Association) succeeded in taking history's first images of a giant squid. Their teams had worked together for nearly two years to make the accomplishment. They used a five-ton fishing boat and only two crew members. The images were created on their third trip to a known Sperm whale hunting grounds 600 miles south of Tokyo, where they had dropped a 3,000 foot line baited with squid and shrimp. The line also held a camera and a flash. After over twenty tries that day, a 26-foot Giant squid attacked the lure and snagged its tentacle. It took the squid over four hours to break free, during which time the camera took over 500 photos. These were the first photographs ever captured of a live giant squid in its natural habitat. The squid left behind, attached to the lure, an 18-foot tentacle. Later, DNA tests confirmed the animal as a Giant squid.

On September 27, 2005, Kubodera and Mori released the photos to the world. The photo sequence, taken at a depth of 900 m (nearly 3000 ft) off Japan's Ogasawara Islands, shows the squid homing in on the baited line and enveloping it in "a ball of tentacles." The researchers were able to locate the likely general location of giant squid by closely tailing the movements of sperm whales. According to Kubodera, "we knew that they fed on the squid, and we knew when and how deep they dived, so we used them to lead us to the squid." Kubodera and Mori reported their observations in the journal proceedings of the Royal Society.

Among other things, the observations demonstrate actual hunting behaviors of adult Architeuthis, a subject on which there had been much speculation. The photographs showed an aggressive hunting pattern by the baited squid, leading to it impaling a tentacle on the bait ball's hooks. This may disprove the theory that the giant squid is a drifter which eats whatever floats by, rarely moving so as to conserve energy. It seems that the species has a much more belligerent feeding technique.

In December 2005, the Melbourne Aquarium in Australia paid AUD$100,000 for the intact body of a giant squid, preserved in a giant block of ice, which had been caught by fishermen off the coast of New Zealand's South Island earlier in the year. [1]

Giant squid prior to 1857

Tales of giant squid have been common among mariners since ancient times, and may have led to the Norwegian legend of the kraken, a tentacled sea monster as large as an island capable of engulfing and sinking any ship. Steenstrup, the describer of Architeuthis, suggested a giant squid was the species described as a sea monk to the Danish king Christian III c.1550. The Lusca of the Caribbean and Scylla in Greek mythology may also derive from giant squid sightings. However, it is thought to be impossible for a giant squid to lift its tentacles from the water. Eyewitness accounts of other sea monsters like the sea serpent are also thought to be mistaken interpretations of giant squid.

Giant squid in culture

Giant squid sculpture in Seattle, USA

Species

The taxonomy of the giant squid, as with many cephalopod genera, has not been entirely resolved. Lumpers and splitters may propose as many as eight species or as few as one. The broadest list is:

It is probable that not all of these are distinct species. No genetic or physical basis for distinguishing between the named species has been proposed, as evidenced by the placenames -- of location of specimen capture -- used to describe several of them. The rarity of observations of specimens and the extreme difficulty of observing them alive, tracking their movements, or studying their mating habits militates against a complete understanding.


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The rarity of observations of specimens and the extreme difficulty of observing them alive, tracking their movements, or studying their mating habits militates against a complete understanding. See also: Black Monday, Black Tuesday, Black Wednesday, Black Thursday, Black Saturday and Black Sunday. No genetic or physical basis for distinguishing between the named species has been proposed, as evidenced by the placenames -- of location of specimen capture -- used to describe several of them. Other uses of the term include:. It is probable that not all of these are distinct species. In history there have been a number of events that happened on a Friday and are thus known as Black Friday:. The broadest list is:. It is a day when widespread anti-social behaviour due to public alcohol consumption is expected to occur, and police are given additional powers to combat it.

Lumpers and splitters may propose as many as eight species or as few as one. "Black Friday" is the name given to the last Friday before Christmas in the United Kingdom. The taxonomy of the giant squid, as with many cephalopod genera, has not been entirely resolved. "Black Friday" is the title of a poem written by Dennis Rader, the BTK killer. Eyewitness accounts of other sea monsters like the sea serpent are also thought to be mistaken interpretations of giant squid. "Black Friday Rule" is the title of a song by Flogging Molly. However, it is thought to be impossible for a giant squid to lift its tentacles from the water. "Black Friday" is the title of a song by Megadeth.

The Lusca of the Caribbean and Scylla in Greek mythology may also derive from giant squid sightings. "Black Friday" is the title of a song by Steely Dan. Steenstrup, the describer of Architeuthis, suggested a giant squid was the species described as a sea monk to the Danish king Christian III c.1550. Black Friday (2005 film) - an unreleased film on the 1993 serial bomb blasts in Mumbai. Tales of giant squid have been common among mariners since ancient times, and may have led to the Norwegian legend of the kraken, a tentacled sea monster as large as an island capable of engulfing and sinking any ship. Black Friday (1940 film) - science-fiction/horror film starring Boris Karloff, Stanley Ridges and Bela Lugosi. [1]. Black Friday (shopping) - the day after Thanksgiving Day in the United States, the first shopping day of the Christmas season and one of the busiest shopping days of the year.

In December 2005, the Melbourne Aquarium in Australia paid AUD$100,000 for the intact body of a giant squid, preserved in a giant block of ice, which had been caught by fishermen off the coast of New Zealand's South Island earlier in the year. Black Friday - the Friday preceding Easter, also known as Good Friday or God Friday. It seems that the species has a much more belligerent feeding technique. Black Friday — a name used for any Friday which falls on the 13th of a month. This may disprove the theory that the giant squid is a drifter which eats whatever floats by, rarely moving so as to conserve energy. Black Friday (2004) - a crackdown on a peaceful protest in the capital city of Maldives, Malé. The photographs showed an aggressive hunting pattern by the baited squid, leading to it impaling a tentacle on the bait ball's hooks. Black Friday (1982) - known in Britain after Argentina invaded the Falkland Islands, sparking the Falklands War.

Among other things, the observations demonstrate actual hunting behaviors of adult Architeuthis, a subject on which there had been much speculation. Black Friday (1978) - a massacre of protesters in Iran. According to Kubodera, "we knew that they fed on the squid, and we knew when and how deep they dived, so we used them to lead us to the squid." Kubodera and Mori reported their observations in the journal proceedings of the Royal Society. studios leading to the eventual breakup of the CSU. The photo sequence, taken at a depth of 900 m (nearly 3000 ft) off Japan's Ogasawara Islands, shows the squid homing in on the baited line and enveloping it in "a ball of tentacles." The researchers were able to locate the likely general location of giant squid by closely tailing the movements of sperm whales. Hollywood Black Friday, October 5, (1945) - the day the 6 month old Confederation of Studio Unions (CSU) strike boiled over into a bloody riot at the Warner Bros. On September 27, 2005, Kubodera and Mori released the photos to the world. Black Friday (1945) - Largest air battle over Norway, over Sunnfjord.

Later, DNA tests confirmed the animal as a Giant squid. Black Friday (1939) - a day of devastating fires in Australia. The squid left behind, attached to the lure, an 18-foot tentacle. Black Friday (1921) - day on which British dockers' and railwaymen's union leaders announced their decision not to call for strike action against wage reductions for miners. These were the first photographs ever captured of a live giant squid in its natural habitat. Black Friday (1919) - a riot in Glasgow stemming from industrial unrest. It took the squid over four hours to break free, during which time the camera took over 500 photos. Black Friday (1929) - a stock market crash in the US.

After over twenty tries that day, a 26-foot Giant squid attacked the lure and snagged its tentacle. Black Friday - (1912) - WSPU took militant action when the Conciliation Bill failed. The line also held a camera and a flash. Black Friday (1869) - a financial crisis in the United States. The images were created on their third trip to a known Sperm whale hunting grounds 600 miles south of Tokyo, where they had dropped a 3,000 foot line baited with squid and shrimp. They used a five-ton fishing boat and only two crew members.

Their teams had worked together for nearly two years to make the accomplishment. On September 30, 2004, Tsunemi Kubodera (National Science Museum of Japan) and Kyoichi Mori (Ogasawara Whale Watching Association) succeeded in taking history's first images of a giant squid. Approximately 65 specimens, one-fifth of all the giant squid ever found, have been found in the waters off Newfoundland; the last in December 2004. Larval Architeuthis closely resemble larvae of Nototodarus and Moroteuthis, with distinctive characteristics being the shape of the mantle attachment by the head, the tentacle suckers, and the beaks.

The search for a live Architeuthis specimen includes attempts to find live young, including larvae. By and large, however, squid strandings remain a mystery. A period of 90 years between mass strandings has been proposed by Frederick Aldrich, an Architeuthis specialist, who used this value to correctly predict a relatively small stranding that occurred between 1964 and 1966. Many scientists who have studied squid mass strandings believe that they are cyclical and predictable, but the length of time between strandings is not yet known.

It is not known exactly why giant squid become stranded on shore, but it is possible that a periodic though temporary alteration of the distribution of the deep, cold water where the squid live might be the cause. Although strandings continue to occur sporadically throughout the world, the high frequency of strandings at Newfoundland and New Zealand in late nineteenth century have not yet been repeated. Large numbers of strandings also occurred in New Zealand during the late nineteenth century. In 1873 a squid "attacked" a minister and a young boy in a dory in Bell Island, Newfoundland.

For example, a specimen washed ashore in Glover's Harbour, Newfoundland on November 2, 1878 was 6.1m (20 ft) long (mantle length), and one of its tentacles measured 10.7m (35 ft) long and it was estimated as weighing 2.2 tonnes. Between 1870 and 1880, large numbers of strandings occurred on the shores of Newfoundland. A portion of a giant squid was secured by the French gunboat Alecton in 1861 leading to wider recognition of the species/genus in the scientific community. He first used the term "Architeuthis" in a paper in 1857.

Japetus Steenstrup produced a number of papers on giant squid in the 1850s. Much of what is known about these animals come from estimates based on these, and from undigested beaks found in sperm whale stomachs. The age of giant squids can be estimated by "growth rings" in the statocyst's "statolyth" much like counting tree rings. Like all cephalopods they use special organs called statocysts to sense their orientation and motion in the water.

This makes the giant squid unfit for human consumption, although sperm whales seem to be attracted by (or are at least tolerant of) its taste. One of the more unusual aspects of giant squid (as well as some other species of large squid) is their reliance upon the low density of ammonia in relation to seawater to maintain neutral buoyancy in their natural environment, as they lack the gas-filled swim bladder that fish use for this function; instead, they use ammonia (in the form of ammonium chloride) in the fluid of their flesh throughout their bodies. Because sperm whales are skilled at locating giant squid, scientists have attempted to conduct in-depth observations of sperm whales in order to study squid. The only other known predator of the adult giant squid is the Pacific sleeper shark, found off Antarctica, but it is not yet known whether these sharks actively hunt the squid, or are simply scavengers of squid carcasses.

The size of these suction cups can vary from 2 to 5 cm in diameter (one to two inches), and it is not uncommon to find their circular scars on the head area of sperm whales that have fed — or attempted to feed — upon giant squid. Giant squid possess the largest eyes of any living creature ever, over 30 cm (one foot) in diameter, and their arms are equipped with hundreds of suction cups in total; each is mounted on an individual "stalk" and equipped around its circumference with a ring of sharp teeth to aid the creature in capturing its prey by firmly attaching itself to it both by suction and perforation. The reproductive cycle of the giant squid is still a great mystery, but what has been learned so far is both bizarre and fascinating; male giant squid are equipped with a prehensile spermataphore-depositing tube, or Hectocotylus, of over 90 cm (three feet) in length, which extends from inside the animal's mantle and apparently is used to inject sperm-containing packets into the female squid's arms — how exactly the sperm then is transferred to the egg mass is a matter of much debate, but the recent recovery in Tasmania of a female specimen having a small subsidiary tendril attached to the base of each of its eight arms could be a vital clue in the solution of this enigma. Post-larval juveniles have been discovered in surface waters off New Zealand, and there are plans to capture more such juveniles and maintain them in an aquarium in an attempt to learn more about the creature's biology and habits.

The weights of recovered specimens have been measured in hundreds, rather than thousands, of kilograms. Despite their great length, giant squid are not particularly heavy when compared to their chief predator, the Sperm Whale, because the majority of their length is taken up by their eight arms and two tentacles. . The photos were released a year later.

On September 30, 2004, researchers from the National Science Museum of Japan and the Ogasawara Whale Watching Association took the first images of live giant squid in their natural habitat. There were reported claims of specimens of up to 20 m (66 ft), but none had been scientifically documented. The mantle length, though, is only about 2 m (7 ft) in length (more for females, less for males), and the length of the squid excluding its tentacles is about 5 m (16 ft). They are deep-ocean dwelling squid that can grow to a tremendous size: recent estimates put the maximum size at 10 m (34 ft) for males and 13 m (44 ft) for females from caudal fin to the tip of the two long tentacles (second only to the Colossal Squid at an estimated 14 m, one of the largest living organisms).

Giant squids, once believed to be mythical creatures, are squid of the Architeuthidae family, represented by as many as eight species of the genus Architeuthis. Architeuthis stockii. Architeuthis sanctipauli, "Southern Giant Squid". Architeuthis physeteris.

Architeuthis martensi. Architeuthis kirkii. Architeuthis japonica. Architeuthis hartingii.

Architeuthis dux, "Atlantic Giant Squid". A song by the heavy metal group "Tourniquet" titled "Architeuthis" is about the mysteries of the giant squid. In the film "The Squid and the Whale". The Doctor Who episode The Power of Kroll (1978) features a carnivorous monster resembling a giant squid (the largest monster ever seen in the series) which lives at the bottom of a swampy lake, and is worshipped by the natives (despite the fact that it sometimes eats them).

In the Futurama episode The Deep South, Fry and Umbriel cheer at a fight between a sperm whale and a giant squid. The House on the Rock in Spring Green, Wisconsin has an enormous sculpture of a giant squid and sperm whale battling. In the Sega Dreamcast game Skies of Arcadia, the main character fights (in a ship battle) a giant squid named Obispo. In Command & Conquer: Red Alert 2, mind-controlled Giant Squids are one of the most powerful naval units in the Soviet arsenal.

Lovecraft is known to have squid like creatures in his Cthulhu mythos. H.P. Chapter 59 ("Squid") of Moby-Dick details the Pequod's encounter with a giant (or perhaps colossal) squid. River Moth, which flows through author Jeff VanderMeer's fictional city Ambergris, is inhabited by a giant squid.

Although Tolkien's description is vague, the creature is frequently depicted as a giant squid or kraken with varying (often exaggerated) numbers of tentacles, and appeared as such in the 2001 film. Tolkien's Lord of the Rings: The Fellowship of the Ring, the Fellowship come up against the Watcher in the Water, a monster that lurks in the waters of the Sirannon, beneath the western walls of Moria. In J.R.R. A giant squid acts as a minor character in Charles Sheffield's novel The Web Between the Worlds.

A giant squid fighting a sperm whale is shown on the album cover of They Might Be Giants' Apollo 18. However Benchley's description of the Beast (with clawlike teeth in the center of its suckers) more accurately describes the Colossal Squid. Jaws' author Peter Benchley's novel Beast features a giant squid terrorizing Bermuda. A giant squid is a key player in Michael Crichton's novel Sphere, as well as in the film version.

A giant squid also dwells in the lake at Hogwarts in the Harry Potter series of books. No. James Bond fights a giant squid in Ian Fleming's book, Dr. Captain Nemo's submarine, the Nautilus, fights a giant squid in Twenty Thousand Leagues Under the Sea..