Ondine

Ondine is a movie starring Colin Farrell, Alicja Bachleda, and Dervla Kirwan. An Irish fisherman discovers a woman in his fishing net whom his precocious daughter believes to be a selkie.
On the coast of Cork, Syracuse is a divorced fisherman who has stopped drinking. His precocious daughter Annie has failing kidneys. One day, he finds a nearly-drowned young woman in his net; she calls herself Ondine and wants no one to see her. He puts her up in an isolated cottage that was his mother's. Annie discovers Ondine's presence and believes she is a selkie, a seal that turns human while on land. Syracuse is afraid to hope again.