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This article is about sea serpents in mythology and cryptozoology. For actual, well-known sea-living snakes, see Sea snake
A sea serpent or sea dragon is a mythological sea monster either wholly or partly serpentine.
Sightings of sea serpents have been reported for hundreds of years, and continue to be claimed today. Cryptozoologist Bruce Champagne identified more than 1,200 purported sea serpent sightings.1 Despite these numerous sightings, no credible physical evidence has been recorded and it is currently believed that the sightings can be best explained as misidentification of known animals such as whales.
In Norse mythology, Jörmungandr, or "Midgårdsormen" was a sea serpent so long that it encircled the entire world, Midgard. Some stories report of sailors mistaking its back for a chain of islands. Sea serpents also appear frequently in later Scandinavian folklore, particularly in that of Norway.
In Swedish ecclesiastic and writer Olaus Magnus'sCarta marina, many marine monsters of varied form, including an immense sea serpent, appear. Moreover, in his 1555 work History of the Northern Peoples, Magnus gives the following description of a Norwegian sea serpent:
Those who sail up along the coast of Norway to trade or to fish, all tell the remarkable story of how a serpent of fearsome size, 200 feet long and 20 feet wide, resides in rifts and caves outside Bergen. On bright summer nights this serpent leaves the caves to eat calves, lambs and pigs, or it fares out to the sea and feeds on sea nettles, crabs and similar marine animals. It has ell-long hair hanging from its neck, sharp black scales and flaming red eyes. It attacks vessels, grabs and swallows people, as it lifts itself up like a column from the water.
Sea serpents were known to sea-faring cultures in the Mediterranean and Near East, appearing in both mythology (the Babylonian Labbu) and in apparent eye-witness accounts (Aristotle's Historia Animalium). Better known today are the Biblical references to Leviathan and Rahab, from the Hebrew Tanakh.
Historical and notable cases
Sea serpent reported by Hans Egede, Bishop of Greenland, in 1734. Henry Lee suggested the giant squid as an explanation.
The "Great Sea Serpent" according to Hans Egede.
Maned sea serpent from Bishop Erik Pontoppidan's 1755 work Natural History of Norway.
The Gloucester sea serpent of 1817.
A curiously hairy sea serpent.
Albert Koch's 114-foot long "Hydrarchos" fossil skeleton from 1845. It was found to be an assembled collection of bones from at least five fossil specimens of Basilosaurus.
The "long black creature" sighted by the crew of HMS Plumper off the Portuguese coast in 1848.
The sea serpent spotted by the crew of HMS Daedalus in 1848.
Another of the original illustrations of the HMS Daedalus encounter
Oarfish that washed ashore on a Bermuda beach in 1860. The animal was 16 feet long and was originally described as a sea serpent.
Hans Egede, the national saint of Greenland, gives one of the 18th century descriptions of a sea serpent. On 6 July, 1734 his ship sailed past the coast of Greenland when suddenly those on board
"saw a most terrible creature, resembling nothing they saw before. The monster lifted its head so high that it seemed to be higher than the crow's nest on the mainmast. The head was small and the body short and wrinkled. The unknown creature was using giant fins which propelled it through the water. Later the sailors saw its tail as well. The monster was longer than our whole ship", wrote Egede. (Mareš, 1997)
In the 19th century there were several major sea serpent sightings on the Gloucester and Maine coasts of New England, which spawned a rather silly mix-up. On August 18, 1817, a meeting of the New England Linnaean Society went so far as to give a deformed terrestrial snake the name Scoliophis atlanticus (thinking it was the juvenile form of a sea serpent that had recently been seen nearby). After the Linnaean Society's misidentification was discovered, it was frequently cited by debunkers as evidence that the creature did not exist; when in fact, the only thing proven by the incident was that the Society had made an embarrassing public error.
A particularly famous sea serpent sighting was made by the men and officers of HMS Daedalus in August, 1848 during a voyage to Saint Helena in the South Atlantic; the creature they saw, some 60 feet long, held a peculiar maned head above the water. The sighting caused quite a stir in the London papers, and Sir Richard Owen, the famous English biologist, proclaimed the beast an elephant seal. Other explanations for the sighting proposed that it was actually an upside-down canoe, or a posing giant squid.
Another sighting took place in 1905 off the coast of Brazil. The crew of the Valhalla and two naturalists, Michael J. Nicoll and E. G. B. Meade-Waldo, saw a long-necked, turtle headed creature, with a large dorsal fin. Based on its dorsal fin and the shape of its head, some experts (such as Heuvelmans) have suggested that the animal was some sort of marine mammal. A skeptical suggestion is that the sighting was of a posing giant squid, but this is hard to accept given that squids do not swim with their fins or arms protruding from the water.
On April 25, 1977, the Japanese trawler Zuiyo Maru, sailing east of Christchurch, New Zealand, caught a strange, unknown creature in the trawl. Photographs and tissue specimens were taken. While initially identified as a prehistoric plesiosaur, analysis later indicated that the body was the carcass of a basking shark.
What makes sea serpent sightings different from sightings of other unconfirmed creatures is not only the sheer number of sightings, but the fact that many of these sightings have been made by multiple people at once for sustained periods of time. Instead of just one to a few witnesses purporting to have witnessed the creature for just a few moments, some sightings involve dozens, or even hundreds, of people claiming to have seen the creature over the course of a couple to a few hours. In many cases, these sightings are well documented in the newspapers of the day, although most occurred before any kind of photographic technology existed.
Sea serpent sightings continue today, with reports coming in from the Pacific Northwest and California; the most notable of recent occurrences is the alleged filming of sea serpents by the brothers Bill and Bob Clark in San Francisco bay.
While most cryptozoologists recognize that at least some reports are simple misidentifications, they point out that many of the creatures described by those who have seen them look nothing like the known species put forward by skeptics and claim that certain reports stick out. For their part, the skeptics remain unconvinced, pointing out that even in the absence of out-right hoaxes (such as the infamous "Surgeon's Photo" of the Loch Ness Monster), imagination has a way of twisting and inflating the slightly out-of-the-ordinary until it becomes extraordinary.
Classification systems
Cryptozoologists may further argue for the existence of sea serpents by pointing out that people see similar things, and it is possible for them to classify the different "types". While there have been different classification attempts with different results, they all share several common characteristics.
Long Necked or Megalotaria longicollis: A 60 foot, long necked, short tailed sea lion. Hair and whiskers reported. Cosmopolitan.
Merhorse or Halshippus olai-magni: A 60 foot, medium necked, large eyed, horse-headed pinniped. Often has whiskers. It is also cosmopolitan.
Many-Humped or Plurigibbosus novae-angliae: A 60-100 foot, medium necked, long bodied archaeocete. It has a series of humps or a crest on the spine like a sperm whale's or grey whale's. It only lives in the North Atlantic.
Super Otter or Hyperhydra egedei: A 65-100 foot, medium necked, long bodied archeocete that resembles an otter. It moves in numerous vertical undulations (6-7). Lived near Norway and Greenland, and presumed to be extinct by Heuvelmans.
Many Finned or Cetioscolopendra aeliani: A 60-70 foot, short necked archeocete. It has a number of lateral projections that look like dorsal fins, but turned the incorrect way. Compare to the armor on Desmatosuchus, but much more prominent.
Super Eels: A group of large and possibly unrelated eels. Partially based on the Leptocephalus giganteus larvae, later shown to be normal sized. [This is a controversial identification of a larval specimen made without benefit of actually examining the specimen. This "identification" was done by the paperwork and the actual specimen was missing by then.] Heuvelmans theorized eel, synbranchid, and elasmobranch identities as being possible. Cosmopolitan.
Giant Invertebrates: Giant Venus's girdle and salp colonies. Added. It is not clear if Heuvelmans intended them to be unknown species or extreme forms of known species.
Classic Sea Serpent: A quadrupedal, elongated animal with the appearance of many humps when swimming. Essentially a composite of the many humped, super otter, and super eels types. The authors suggest Basilosaurus as a candidate, or possibly Remingtoncetids.
Waterhorse: A large pinniped, similar to the long necked and merhorse. Only the males are maned, but females appear to have snorkels. Both of their eyes are rather small. They are noteworthy for being behind both salt and fresh water sightings.
Mystery Cetacean: A category of unknown whale species including double finned whales and dolphins, dorsal finned sperm whales, unknown beaked whales, an unknown orca, and others.
Mystery Manta: A small manta ray with dorsal markings.
Great Sea Centipede: Same as the many finned. The authors suggest the flippers may either be retractile, and the "scaly" appearance could be caused by parasites.
1A Long Necked: A 30 foot sea lion with a long neck and long tail. The neck is the same thickness or smaller than the head. Hair reported. It is capable of travel on land. Cosmopolitan.
1B Long Necked: Similar to the above type but over 55 feet long and far more robust. The neck is of lesser thickness than the head. Only inhabits water near Great Britain and Denmark.
2A Eel-Like: A 20-30 foot long heavily scaled or armored reptile. It is distinguished by a small square head with prominent tusks. "Motorboating" behavior on surface. Inhabits only the North Atlantic.
The Type 2A sea serpent according to Cameron McCormick. Drawn July, 2005.
2B Eel-Like: A 25-30 foot beaked whale. It is distinguished by a tapering head and a dorsal crest. "Motorboating" behavior engaged in. Inhabits the Atlantic and Pacific. Possibly extinct.
2C Eel-Like: A 60-70 foot, elongated reptile with no appendages. The head is very large and cow-like or reptilian with teeth similar to a crabeater seal's. Also shares the "motorboating" behavior. Inhabits the Atlantic, Pacific, and South China Sea. Possibly extinct.
3 Multi-Humped: 30-60 feet long. A possible reptile with a dorsal crest and the ability to move in several undulations. The head has a distinctive "cameloid" appearance. Identical with Cadborosaurus willsi.
4A Sailfin: A 30 to 70 foot beaked whale. It is distinguished by a very small head and a very large dorsal fin. Only found in the North West Atlantic. Possibly extinct.
4B Sailfin: An elongated animal of possible mammalian or reptilian identity reported from 12 to 85 feet long. It has a long neck with a turtle-like head and a long continuous dorsal fin. Cosmopolitan.
5 Carapaced: A large turtle or turtle-like creature (mammal?) reported from 10 to 45 feet long. Carapace is described as jointed, segmented, and plated. May exhibit a dorsal crest of "quills" and a type of oily hair. Cosmopolitan.
6 Saurian: A large and occasionally spotted crocodile or crocodile-like creature up to 65 feet long. Found in the Northern Atlantic and Mediterranean.
7 Segmented/Multi limbed: An elongated mammalian creature up to 65 feet long with the appearance of segmentation and many fins. Found in the Western Atlantic, Indian, and Pacific.
^ Bruce Champagne. A Preliminary Evaluation of a Study of the Morphology, Behavior, Autoecology, and Habitat of Large, Unidentified Marine Animals, Based on Recorded Field Observations.Available at strangeark. Pages 99-118
Loren Coleman and Patrick Huyghe. The Field Guide to Lake Monsters, Sea Serpents, and Other Mystery Denizens of the Deep. Jeremy P. Tarcher 2003.