WWF says 180 countries and territories took part in this year's event to raise awareness of climate change
The 278-kg bluefin tuna was sold to the owner of a Japanese sushi restaurant, but experts say demand for the fish has made it an endangered species.
A dead sperm whale was found washed ashore in Indonesia with nearly 6kg of plastic waste in its stomach, according to park officials.
The WWF estimates that current rate of species extinction are now up to 1,000 times higher than the standard rate of extinction in Earth's history.
The world is on course for the first mass extinction of animal life since the dinosaurs, according to a new report on wildlife populations
Global wildlife populations have fallen a staggering 58 percent between 1970 and 2012, according to a report by the WWF and the Zoological Society.