Despite a lack of scientific evidence linking the two events, a flurry of online commentators have pointed to the appearance of around 50 melon-headed whales - a species that is a member of the dolphin family - on Japan's beaches six days prior to the monster quake, which unleashed a towering tsunami and triggered a nuclear disaster.
Scientists were on Saturday dissecting the bodies of the whales, 156 of which were found on two beaches on Japan's Pacific coast a day earlier, but could not say what caused the beachings.
"We don't see any immediate signs of diseases on their bodies, such as cancer. We want to figure out what killed these animals," Tadasu Yamada, a senior researcher at National Museum of Nature and Science, told public broadcaster NHK.
