The Moon Pool has the power to turn normal people into real life mermaids/mermen. This can only happen when there's a full moon directly over the moon pool though.The Moon Pool is located in a secret cave on Mako Island.
- The makers of H2O:Just Add Water and Secret of Mako Island made The Moon Pool. It is completely artificial.
- Until Secret of Mako Island is released, the only people affected by the Moon Pool's magic have all been female.
- everyone who enters the moon pool during a full moon may go through changes.