Police are searching for a 10-foot shark spotted off the Costa del Sol holiday resort of Fuengirola.
Emergency services began to receive calls about the fish around 1pm local time today and red flags were hoisted along more than five miles of coastline.
It was first seen off Torreblanca beach before new sightings nearer Malaga off Los Boliches beach of a shark thought to be the same one.
Footage taken by stunned onlookers showed the fish – thought to be a tintorera or blue shark – moving through the water.
Fuengirola beach is one of the most popular of the Costa del Sol with British and Irish tourists.
Bathers were asked to leave the water while local police and Civil Guard launched a search. It had yet to be found by late lunchtime today.
Blue shark are one of the most common species of sharks in the Mediterranean.
The same type of shark was blamed for an attack on a holidaymaker in Elche near Alicante in July 2016.