The Sirens on the Shore

According to Wikipedia, in Greek Mythology,

Sirens were dangerous creatures, who lured unwary sailors 

with their enchanting music and voices to shipwreck on the rocky coast.

I'm not sure if it works that way today on the shores of Plymouth Sound.

Copenhagen is not the only harbour with a mermaid.

 On calm, sunny days they can be seen on every rocky outcrop around Plymouth Sound.