Ceasg
From Infogalactic: the planetary knowledge core
A ceasg is a mermaid in Scottish mythology, a supernatural half-woman and half-grilse (salmon).[1][2] It is also known in Scottish Gaelic as maighdean na tuinne ("maid of the wave") or maighdean mhara ("maid of the sea").[2] The ceasg is said to be able to grant three wishes to anyone that captures her.[2]
