I have been racking my brains for over three months to find out the name of a show I've seen as a kid on theAustralianTV. All I remember about the show is that there is a big family which lives in a lighthouse. And magical things keep happening in each episode. I remember one episode in which a boy who lives with his father and a girl from this big family fall in love and slowly the boy starts to transform into a merman because his mother is a mermaid. At the end of the episode the boy's father, his girl friend re-unite the boy and his mother and the by returns to the world of sea.
Thanks in advance for telling me the name of the show.