A countless number of jellyfish washed ashore a popular beach near the village of Shchelkino, prompting those wishing to enjoy the warm Sea of Azov to go elsewhere.
The increase in the jellyfish population is caused by warm and dry weather in the region in recent years, said Sergei Alymov, a researcher at the Russian Institute of Biology of the South Sea.
Dry weather reduces the amount of fresh water flowing from rivers to the sea, which ultimately makes the seawater saltier, creating an ideal environment for jellyfish.
With a large amount of food in the Sea of Azov, jellyfish can quickly increase their population, Alemov said.
The jellyfish population is likely to remain high as long as the water is salty enough, he added.
Although some tourists still wanted to swim among the jellyfish, the beach at Shkolkino was practically empty on Monday.
Alena Plyas, who came to Crimea on vacation from Moscow, said that it was difficult to swim in the sea, as she had to feel the jellyfish and their "cold, disgusting touch."