Selkie

Selkie (2000) is a adventure, family, fantasy directed by Donald Crombie rated 5.3/10.

Teenager Jamie moves with his mother, sister and grandfather to an island off the South Australian coast where mum has a job running a marine research station. To his discomfort, Jamie discovers he's a "selkie" - half human, half seal - that explains the webbing on his hands and also why he changes completely into a seal as soon as he hits water.