Her family was drowned, but she survived in an underwater chamber in the lake for a year, after which she was transformed into a being who was half-human, half-salmon.
She promised to meet at the seaport inlet of Inbhear nOllarbha (Larne Lough) in Ireland after one year, and was captured in a fishnet.
[3] Liban, a mermaid (muirgelt) who was the daughter of Eochaid, was captured in the year 558 A.D. according to the Annals of the Four Masters, compiled the 17th century.
An account of Liban's life story is found in the tale Aided Echach maic Maireda (Death of Eochaid son of Mairid), preserved in the 12th century Lebor na hUidre ("Book of the Dun Cow").
Together with her lapdog which assumed the form of an otter, the mermaid was free to roam the seas for 300 years, while maintaining her dwelling under the same Lough.