According to Tree Hugger on Jan. 23, 2013, it reported that when scientists took a trip to the Azores of the North Atlantic to study sperm whales, they had discovered an unusual sighting. A bottle-nosed dolphin that was swimming among them.
What stuck about the dolphin was its deformed appearance and it's sluggishness of movement. Apparently the dolphin sought refuge among the pod of sperm whales because, according to scientists Alexander Wilson and Jens Krause, it might not have been accepted or even in fact, bullied, out of its former dolphin pod.
"It really looked like they had accepted the dolphin for whatever reason," says Wilson, in a report from Science Magazine. "They were being very sociable."
In the past, there had been inter species interaction between whales and dolphins, there had been never been an observance in this case where there had been a separate species who have spent an extended amount of time with a different animal type.
There had been accounts of where different species of marine mammals had partaken in playful activities with each other. It's not often that this kind of interaction occurs, but more often in the form predator vs. prey being the most common interaction. The former is rather less gruesome. If anyone gets a glimpse of sea lions interacting with killer whales, you know there's very unusual about that.