Bodies of dead porpoises off the coast of California have perplexed scientists for some time. Researchers now say they are most likely being killed by dolphins after new video footage has surfaced showing dolphins killing porpoises.
Related to dolphins and whales, the porpoise is often referred to as a "small dolphin."
However, this is not the first time such footage has been discovered. One video posted to YouTube in February 2008 shows dolphins killing porpoises, repeatedly flipping them in the air and attacking them.
SEE THE VIDEO (An attack in action begins around 1:06):