Hello, I made a video on all the mermaid locations in Peaks of Yore! In the game there are 7 different mermaids to find scattered around 6 peaks in the Gales. By finding all of the mermaids you unlock the Keen Sight achievement on Steam.

https://www.youtube.com/watch?v=fsAwEM8RTJQ

0:00 Mermaid Location #1: On the top of The Lighthouse
0:08 Mermaid Location #2: Off the coast from the summit on The Lighthouse
0:16 Mermaid Location #3: Off the coast from the start of Hangman's Leap
0:25 Mermaid Location #4: Off the coast from the summit on Land's End
0:33 Mermaid Location #5: Off the coast from the summit on Old Langr
0:41 Mermaid Location #6: Off the coast from the start of Three Brothers
0:50 Mermaid Location #7: Off the coast of the summit on Ugsome Stórr