Big Trouble in Mystic City - S1.E6

The shine on the buildings in Mystic City is more than just beautiful, it also powers everything in the city. No more color and light means an end to mermaid way of life. Orra has given Shellnelle, Jordie, Riviera, Harmonique, and Kishiko color change abilities to help fight back, but mastering these new abilities will take some practice. How will the mermaids master their new color changing fins?