The death of two and a half thousand river calves on the coast of Russia became a mystery.
According to the British media, about two and a half thousand seals have been found dead on the coast of the Caspian Sea in Russia. Their samples have been sent to the laboratory for testing to find out the cause of death.
British media reports said that initially around 700 dead river calves were reported, but further investigation revealed a much higher number.
The head of the Caspian Environmental Protection Center says the river calves likely died about two weeks ago.
He said there was no evidence that river calves were killed or caught in fishing nets.
It should be noted that Caspian seals have been included in the International Union for Conservation of Nature’s list of threatened marine life since 2008.