Mermaid reports from the 1600s
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.

Mermaid · 1608
Witnesses on Henry Hudson's ship in 1608 report sighting a mermaid with white skin, black hair, and a porpoise-like tail that was overturned by a wave.