Mermaid reports from the 1830s
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 · Shetland Islands, Alba / Scotland · 1833
Fishermen claim to have caught a mermaid with a halibut-like tail and webbed fingers, which they threw back after it wailed for three hours.