Australia - August 10, 2025 Griffith University, Australia – A groundbreaking study led by Dr Olaf Meynecke reveals rare footage showing dolphins following humpback whales not only at the surface but all the way to the ocean floor, engaging in close, playful interactions. The research examined 199 documented interactions between 19 whale and dolphin species, using photos and videos from 17 global locations. About a quarter of these encounters were mutual play, with humpback whales displaying behaviours like rolling and belly presentation that suggest friendly socialising. The study challenges the notion that dolphins mainly harass whales, finding most whales responded positively or neutrally to dolphins’ presence. Co-author Olivia Crawley highlighted the fascination of observing bow riding and close contact behaviours, hoping the findings inspire more research. Dolphins were often seen near the whales’ rostrum, similar to bow riding, which may help dolphins save energy and represents a form of play. The study included 425 baleen whales—mostly humpbacks—and 1,570 dolphins, with calves frequently present. Distinct behaviours were noted among whale species, such as pectoral fin movements and rolling, while aggressive actions were uncommon. The unique suction camera footage provided insight into deep-water social play, showing dolphins maintaining contact with whales even on the sea floor. Dr Meynecke explained that while play is often cooperative, some interactions may be one-sided, including teasing during feeding. This research enhances understanding of complex social structures and interspecies interactions in marine ecosystems.