The Life of Mermaids is a chamber larp for 4–6 players, written by Olga Rudak, Mira Suovanen, Jouni Karppinen, and Mo Holkar.
Here's the pitch:
"You are a family that drowned recently in a boating accident at sea, and all of you turned into mer-people. Some of you may be uncertain of how you feel about it; some may be afraid; and others may be enjoying themselves. You are all still adjusting to this new situation: and at the end of the larp you will have the option of staying in this undersea world, or rejecting it and instead going to whatever afterlife you believe in."
You can download the script here: The Life of Mermaids (pdf)