I saw a movie of mermaids few years ago but I forgot the name of the movie. I remember that there were three girls who were sisters. The eldest one has spear which she turns into a hairpin and clips on her hair. The second sister works in a bar and the third sister works as a marine biologist(guess). I think that is how much I know about the movie. I would really like to know the name of the movie if possible.

Mermaids (2003, not 1990)two films same name

Thanks for the reply