Enjoying some fun in the sun, Hayden Panettiere frolicked on the beach in Miami on Sunday (September 1).

The "Nashville" cutie showed off her figure in a blue and yellow chevron print bikini as she jumped in the waves with pals.

Though she and others took in the beach scene over the Labor Day weekend, Hayden's mind was on animals who live in the sea.

Taking to Twitter to raise awareness, she tweeted, "Absolutely heartbroken! 60+ bottlenose dolphins awaiting their fate in Taiji's killing cove. #tweet4taiji Follow @whaleman1 for updates."