Mermaid is the common name for a fabled aquatic creature, typically depicted with the head and torso of a girl or woman, and the tail of a fish. Mermaids appear in the folklore, literature and popular culture of many countries worldwide. The masculine equivalent is called a "merman", and the general terms "merfolk" or "merpeople" are occasionally used to refer to groups without reference to gender.
I created a fish stencil and cut out a bunch of fish from ivory, gray, and blue felt. I then attached them to the wall with poster strips. I had them curve around so it looked like they were swimming in the ocean.