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On 29 September 2014, during a dolphin-watching trip at Posorja, some members of a group of bottlenose dolphins (Tursiops truncatus) were observed rubbing their bodies repeatedly along floating ropes. When the subgroup was approached, it seemed that a dolphin was entangled because the animal was whirling its body with a rope close to the surface. But, it soon became clear that it was not tangled.
Félix, F. (2015). Rope rubbing social play behavior recorded from wild bottlenose dolphins (Tursiops truncatus) in Ecuador. Aquatic Mammals, 41(2), 222-225.