A dead female harbor porpoise that washed ashore in August at San Francisco's Fort Funston showed "evidence of a sadistic attack." Marine biologists believe this was a clear case of "porpicide," the deliberate killing of a harbor porpoise by a bottlenose dolphin.
(Image: These are not the actual dolphins referenced in the story. Photo, Three in a Row, a s CC-licensed image from diorama_sky's photostream, shared in the BB Flickr Pool.)