Heavy ocean swells apparently carried the by-the-wind sailors to the beach starting Friday night and continuing through the weekend until an estimated 10,000 jellies were trapped on the sand.

The San Francisco Chronicle says the beachings attracted hordes of onlookers on Sunday.

Kids kicked then, dogs rolled in them and surfers tossed them like Frisbees.

The jellyfish coating Ocean Beach are likely moon jellies, which have a mild sting that rarely penetrates human skin.

Experts say the beachings aren’t unusual and the tides will carry them away.