Sea monsters

Dec 2011
2,800
Late Cretaceous
#12
And the sighting by HMS Plumper off the Portuguese coast:

Wiki:

After commissioning at Portsmouth, Plumper joined the Channel Fleet under Admiral Sir Charles Napier, and in January 1849 was sent to the North America and West Indies Station. Curiously, a report was published in the Illustrated London Newson 14 April 1849 of a sighting of a sea serpent off the Portuguese Coast.

“On the morning of the 31st December, 1848, in lat. 41° 13'N., and long. 12° 31'W., being nearly due west of Oporto, I saw a long black creature with a sharp head, moving slowly, I should think about two knots ... its back was about twenty feet if not more above water; and its head, as near as I could judge, from six to eight...There was something on its back that appeared like a mane, and, as it moved through the water, kept washing about; but before I could examine it more closely, it was too far astern”— "A Naval Officer"