Activists photographed a group of small whales belonging to the marine dolphin family, last Wednesday, standing on a beach on the island of Boa Vista in the Republic of Cape Verde. Elsa Vieira, one of the local correspondents who works with Reuters news agency and who posted the video on her Facebook page more than once, says that the rescue teams counted the dead whales and found that their number reached 134 whales. The whale that we see in the video above belongs to the melon-headed whale family, and is slightly larger than a dolphin. Until now, the causes of the death of these marine animals were not known, but Vieira said that autopsies carried out by the competent authorities had begun, in order to determine the cause of the death of the whales. There are many factors that may lead to the death of marine animals in this number, including diseases, or even sometimes “a sailing error” (i.e. getting lost), or the water receding (rooting) too quickly, or even leaving the water to escape the danger and attack of other animals, or bad weather. The death of predatory vultures in Argentina. Find out the reason Watch: The death and disappearance of billions of birds in Canada and America over the past 50 years Watch: Drought causes the death of tens of thousands of fish in a lake in Greece