More than 100 surfers fall ill as mysterious sea foam appears on beach

Screengrab. Scores of marine animals have washed up on a pair of Australian beaches and over 100 surfers have reported breathing difficulties, itchy eyes and sore throat after the appearance of a foam - (7NEWS Australia/YouTube)

A mysterious foam has washed up on south Australia’s beaches, coinciding with fish deaths and surfers falling ill with symptoms like coughing, sore throat and blurred vision.

The foam has covered hundreds of metres along Waitpinga Beach, about 15km southwest of Victor Harbor.