A man was filming on a beautiful Brazilian beach when he spotted something in the ocean.

According to the YouTube video description, the events in this video occurred at 8 o'clock in the morning on March 5th 2012. While on the beach at Arraial do Cabo, Brazil, Gerd Traue was recording the tranquil waves hitting the shore when a pod of about 30 dolphins stranded themselves. Luckily, the beachgoers sprang into action and redirected the lost animals back to the ocean where they belong.
In an article for New Scientist, experts posit that this behavior may have been caused by sonar, fishing boats, or difficulties navigating the coastline. Apparently, stranding is becoming an increasingly common problem, which may indicate a larger underlying issue. Mark Simmonds of the Whale and Dolphin Conservation Society offers some advice, should a mass beaching happen again: “There’s a clock ticking, so it’s important to respond quickly, but it’s also important to move them in the right ways...Pulling their flippers can dislocate their bones, or even pull a flipper right off.”