A humpback whale stranded on Argentina's coast died on Monday despite a round-the-clock rescue effort over the weekend from dozens of volunteers. /VCG Photo

The whale swam aground Saturday in the coastal city of Mar del Plata, about 400 kilometers south of Buenos Aires. /VCG Photo

Rescuers and conservationists dug around the six ton whale with heavy machinery and used a crane to lift it and improve its hydration. /VCG Photo