A large number of seals has been washing ashore in Pärnu since the end of last week.
Since June 15, the company responsible for the town's beach cleanup, ISS Estonia, has had to remove 17 dead seals, Pärnu Postimees reported.
No cause of the phenomenon has yet been determined, although seasonal cycles do result in layers of water mixing.
"When the seawater gets warmer, seal corpses rise to the surface and the wind blows them ashore," said Anu Nurmesalu of ISS Estonia's Pärnu office.
She said that as of June 18, the beaches were clean, but if the wind picks up, additional seals could wash up.