Mermaid

Mermaids are a race of immortal creatures of the sea. They can spend eternity at sea because they are cold blooded beings. Mermaids like shiny bubbles, sea shells, and sea shanties are the only songs they know. They spent their lives exploring the wonders of the seas. Mermaids have hearts as cold as the water. However, once a mermaid gets lonely, her heart will warm up and then she will become curious about the world ashore.

History
A mermaid named Mylie became lonely and set out to find love in the mortal world. She made a deal with the Sea Hag, who promised her tp grant her legs for a month to find love. In this time, Mylie had the chance to find someone who would love her. Once time would ran out, the Hag would claim her Immortality. However, since mermaids are immortal beings, only they can give up their immortality. To drain her immortality, she would have to place an Auger Shell on her heart.

Mylie mentioned that there is an underwater magical community and that the Charmed Ones are famous even under the sea. Mylie was able to recognize Phoebe as a Charmed One by seeing an Ask Phoebe billboard.

Powers and Abilities
Mermaids are immortal beings of the sea that have the abilities of agility and sense underwater. Phoebe was able to locate the Sea Hag's lair by following a 'stench in the water'. However, as mermaids are rare and mysterious beings, what other powers they might possess is unknown.

Known Mermaids

 * Mylie
 * Phoebe Halliwell (temporarily)