19:53 GMT24 February 2021
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    Likely explanations for the phenomena offered by netizens include a geyser eruption and ruptured sewer pipe.

    A peculiar phenomenon spotted in the Russian city of Anapa on the Black Sea has puzzled social media users.

    A video recently uploaded on Instagram shows sea water bubbling away just off one of the city's beaches. 

    "It’s got so warm in Anapa that the water is boiling by the sea," the caption reads. "Ever seen such a wonder?"

    This unusual sight left a number of netizens wondering what caused it, with some jokingly comparing it to a "fizzy aspirin" tablet dissolving in water.

    Посмотреть эту публикацию в Instagram

    Публикация от Типичная Анапа (@typoanapa2.0)

    Other, more down-to-earth suggestions, included a ruptured sewage pipe and a possible geyser eruption, while one person advised taking water samples for analysis to dispel the mystery.

    social media, video, water, sea, Russia
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