Mulaster Species

Its people can change into Merpeople, (also known as Merfolk) called Mermaids if they're female and Mermen if they're male, are legendary aquatic creatures of the sea, with the upper bodies and heads of humans and fish tails for lower bodies.
They are followers of Resbus, God of the Ocean and Ghogheia, Goddess of Wind who granted them their powers
They are the native people of The country of Amberwater.