A Swiss tourist killed by a three-metre bull shark on the NSW Mid North Coast and her boyfriend, who is lucky to be alive after the terrifying attack, have been named.

Livia Mulheim, 25, died and Lukas Schindler, 26, was seriously injured after being mauled by a shark during a swim at Crowdy Bay about 6.30am on Thursday.

The shark bit Mr Schindler’s leg as he tried to save his girlfriend.

Livia Mulheim, 25, was killed by the bull shark. Picture: Supplied

Shark attack survivor Lukas Schindler. Image: Instagram
Although Mr Schindler managed to drag his dying girlfriend back to shore with him, she could not be saved.

The Swiss couple had spent the past several months travelling around Australia, visiting beaches and coastal towns in NSW and WA.

Days earlier, the couple were in Noosa, posting on social media about the “incredibly memorable” bed and breakfast they stayed in together after spending a few days camping.

Mr Schindler was in Australia on an “exchange semester” from Switzerland.

He also ran the Syney Marathon, posing at the finish line with his medal.

Ms Mulheim was understood to have visited Australia several times.