Other Aquatic reports from the 1550s
1 case, best-documented first. Page 1 of 1.
We map claims, not creatures. A case is what some source says someone saw or heard, with the link to that source. It is not proof that anything was there, and a retelling counts once, not as a second sighting.

Other Aquatic · Norway · 1556
Olaus Magnus reports seeing a large serpent swimming near Moos island in 1556.