It could be anything from nutrition issues to sonar that drives whales off course, disorients them, or can even cause internal damage. While there has been a rash of strandings in Florida, including at least 15 pilot whales that washed ashore this week in the Florida keys, experts are quick to point out that the BP gulf oil spill is a possible cause, but not the only factor. Earth Times points out that, "A number of recent strandings in other regions happened well before the Deepwater spill occurred. In March 2009, 194 whales and a small dolphin pod became stranded on the coast of Tasmania, and most did not survive. The previous November, 150 pilot whales died in another mass stranding in Tasmania... In February 2011, 107 whales died on the coast of New Zealand."