Residents of a coastal neighbourhood in the Argentine capital Buenos Aires welcomed a surprise guest when a whale accidentally swam into a city marina.
The huge whale was seen surfacing amongst the luxury yachts in Puerto Madero, and after the word spreading quickly on social media sites, hundreds were lining up for a glimpse.
A local police boat tried to lure the whale to the Rio de la Plata river, which connects the marina to the Atlantic.
Experts have suggested the animal was most likely a cub separated from its herd.
"I've never seen one in Puerto Madero," one resident said.
"It's really sad,'' a local bank worker told the Associated Press. "This is not its natural habitat. The poor whale is clearly lost."
A specialist looking at the numerous images on social media identified it as a minke whale, warning that freshwater would damage its health.
But Mariano Sironi, scientific director of the Whale Conservation Institute in Argentina, told AP he thought it was more likely to be a humpback whale.