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The Valhalla Sea Serpent off Brazil (1905)
December 7, 1905 · Off Paraíba, northeast coast of Brazil (7° 14' S, 34° 25' W)
Brazil
Cryptid · Creature · 20 sources
28Thinly documented
The USS Supply "Remarkable Meteors"
February 28, 1904 · Pacific Ocean, about 300 miles WSW of San Francisco (36°20′ N, 127°36′ W)
International waters
UAP · Formation · 16 sources
22Thinly documented
Pro early
The HMS Caroline "Chinese Lanterns" off Quelpart (Jeju)
February 24, 1893 · At sea, sixteen to seventeen miles south of Quelpart (Jeju Island), North China Sea
South Korea
UAP · Orb / light · 19 sources
24Thinly documented
The Flying Dutchman Seen by Prince George, Later George V (1881)
July 11, 1881 · At sea between Melbourne and Sydney, usually placed in Bass Strait
Australia
Paranormal · Other · 21 sources
23Thinly documented
Pro early
HMS Vulture's Revolving Wheels of Light, Persian Gulf, 1879
May 15, 1879 · Persian Gulf, Lat. 26°26′ N, Long. 53°11′ E, aboard HMS Vulture
International waters
UAP · Other · 16 sources
22Thinly documented
Pro early
The Kiushiu Maru sea serpent gripping a whale off Cape Satano
April 5, 1879 · At sea about nine miles off Cape Satano (Cape Sata), Ōsumi Peninsula, Kagoshima, Kyushu
Japan
Cryptid · Creature · 15 sources
18Thinly documented
The Barque Pauline Sea Serpent Off Cape Roque
July 8, 1875 · Off Cape Roque (Cabo de São Roque), north-east Brazil, South Atlantic
Brazil
Cryptid · Creature · 22 sources
22Thinly documented
Giglioli's Whale: the Two-Finned Whale Seen from the Corvette Magenta
September 4, 1867 · South Pacific Ocean, about 1,200 miles (1,930 km) off the coast of Chile
International waters
Cryptid · Creature · 13 sources
22Thinly documented
Pro early
The Castilian Sea Serpent off St Helena
December 12, 1857 · About ten miles off the northeast end of St Helena, South Atlantic
Saint Helena
Cryptid · Creature · 15 sources
24Thinly documented
Pro early
The Monongahela Sea Serpent
January 13, 1852 · East-central Pacific Ocean, just south of the equator (reported position 3°10′S, 131°50′W)
International waters
Cryptid · Creature · 10 sources
14Thinly documented
Pro early
Six Shetland fishermen catch a "mermaid" on their lines off Yell
July 1833 · At sea off the Isle of Yell, North Isles, Shetland, Scotland
United Kingdom
Cryptid · Creature · 13 sources
16Thinly documented
Pro early
The Canna Mermaid Testimonies
c. 1803 · Canna and the sea between Canna and Skye, Inner Hebrides, Scotland
United Kingdom
Cryptid · Creature · 12 sources
17Thinly documented
Pro early
The Ghost Ship of New Haven: the Great Shippe apparition, 1647
c. 1647 · New Haven Harbor, New Haven Colony (now New Haven, Connecticut)
United States
Paranormal · Other · 22 sources
24Thinly documented
The Wild Man (Merman) of Orford, Suffolk
c. 1167 · Orford Castle and the sea off Orford, Suffolk, England
United Kingdom
Cryptid · Creature · 26 sources
14Thinly documented
  • Central Intelligence Agency· 201 pages· 54 pages mention it
    • p. 71 …and at the entrances NSWP National Air Defense Forces to these seas. For operations in the Mediterranean Sea, January 1979…
    • p. 84 …Capabilities for Exercising Sea Denial in NATO Sea Lines of Communication 142. In wartime, the Soviets probably would at- tempt…
  • Central Intelligence Agency· 1992-02-11· 2 pages· 1 page mentions it
    • p. 1 …RADAR INDICATED AN INTRUDING PLANE IN THE WEST SEA AIRSPACE AT 10:05, BUT FIGHTERS SENT UP TO INVESTIGATE FOUND…
  • Department of Transportation. Federal Aviation Administration.· 2023· 1 pages· 1 page mentions it
    • p. 1 …UAP AT FL200-FL220 10 NNW SEA. JAZZ 653 LATER REPORTED SAME UAP MOVING NORTH BOUND 13 ENE SEA. NO…
  • Department of Transportation. Federal Aviation Administration.· 2023· 1 pages· 1 page mentions it
    • p. 1 …AT SAME ALTITUDE FROM THE 2 O'CLOCK POSITION WHILE SSE BOUND AT 10,700 FEET 18 SSE SEA. NO…
  • Department of Transportation. Federal Aviation Administration.· 2023· 1 pages· 1 page mentions it
    • p. 1 …while SE bound at FL350, 50NM WNW of LBL. The unknown phenomenon was described as a sea of flashing white…
  • U.S. Department of War· 2020-08-24· 1 pages· 1 page mentions it
    • p. 1 …22000) Constant? Contact An Speed Please attempt to determine a Lat I Long for the contact at initial detection. We…

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