From the Azura Team - September 2017
All over the world, whales leap high into the air and crash back into the water, slapping their tails and fins on the ocean’s surface on the way down. This behaviour is called "Breaching", and is far more common when pods of humpback whales are far apart (at least 4,000 meters or 2.5 miles). Fin or tail slapping is more frequent as groups split or come together. Scientists (including University of Queensland marine biologist Ailbhe Kavanagh), say these patterns suggest breaching and slapping play a role in both long-distance and close-range communication. By slamming their massive bodies into the water, the resulting sounds, like a drum, can travel enormous distances.