A mass stranding of dolphins occurred on the Aleksino beach in Novorossiysk, Krasnodar Krai.
The cause of the Azovkas' death is said to be a fuel oil spill several dozen kilometers from Anapa.
Ten dead dolphins were discovered by environmentalists from December 15 to 22, the Delfa Scientific and Ecological Dolphin Rescue Center reported on its Telegram channel.

The cause of the mass death of Azov dolphins was most likely a fuel oil spill following the sinking of two tankers.
It is expected that it will take at least a month to clean up the shore.
Several dozen kilometers from Anapa, eight bodies of dolphins were discovered, six of which washed up on the shore.
In total, ten dead Azovs have been identified since the tanker accident in the Kerch Strait.
Environmentalists noted that such cases are extremely rare, but this time there was a mass death.
The first dead dolphin was found on December 18 in Anapa. Later, reports of new cases began to arrive.