To learn more, Crawley and marine biologist Olaf Meynecke analyzed hundreds of videos and photographs to watch how baleen whales and dolphins interact. “We were in particular interested to document the whales’ reactions and responses toward the dolphins’ as commonly dolphins are described to harass and annoy the whales,” Meynecke added. Humpback whales (Megaptera novaeangliae) dominated at 68 percent of the observations, followed by gray whales (Eschrichtius robustus) and fin whales (Balaenoptera physalus). Two videos taken with suction camera tags on humpback whales showed bottlenose dolphins following the whales. For humpback whales, one-third of the observed events with dolphins appeared to be positive.