This species of sea stars, living in the Queen Charlotte Islands in British Columbia, usually purple, but they have the ability to change color depending on the environment. (Photograph by Michael Melford)

This species of sea stars, living in the Queen Charlotte Islands in British Columbia, usually purple, but they have the ability to change color depending on the environment. (Photograph by Michael Melford)

This species of sea stars, living in the Queen Charlotte Islands in British Columbia, usually purple, but they have the ability to change color depending on the environment. (Photograph by Michael Melford)