Wonder Woman shows a new power (for the first and only time in all of the series): she's clearly able to communicate telepathically with animals (like the "mental radio" communication from the comics) and she's even able to scare away a killer shark through a form of "red" submarine energy that she generates deep in the water, in order to save dolphins in danger.
Normally when Diana changes into her swimming costume, she has to cycle through her normal costume first, keep spinning, and then her swimsuit appears. This is the first time that Diana is able to transform into her swimsuit directly without having her normal costume appear first.