Mermaid reports from the 1780s
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 · Worcester, Massachusetts · 1782
Reynolds reports seeing a mermaid-like figure bathing in the sea near Pen-y-hold with human upper body and tail.