Children cool down in the fountain at Spikersuppa in Oslo as the heat wave reaches the Norweigan capital on July 24, 2019. Photo: Ritzau Scanpix / Terje Bendiksby/VCG

For a week, a young female walrus nicknamed Freya has enamoured Norwegians by basking in the sun of the Oslo fjord, making a splash in the media and bending a few boats.

The 600-kilogram marine mammal has been named after the Norse goddess of love and beauty.

She has already been sighted in the UK, the Netherlands, Denmark and Sweden and has now chosen to spend part of the summer in Norway.

Freya first gained notoriety in Norway by climbing onto pleasure boats in Kragero, an idyllic southern coastal village, and has been doing the same in the waters of the capital since July 17.

The presence of the mammal, which normally lives in the even more northerly latitudes of the Arctic, has sparked curiosity among locals and made headlines in the press.

Newspaper Verdens Gang has put up a livestream of the walrus's every move on its website.

Between long naps - a walrus can sleep up to 20 hours a day - Freya has been filmed chasing a duck, attacking a swan and, more often than not, dozing on boats struggling to support her bulk.

"It's a pity about the material damage but that's the way it is when you have wild animals," Rolf Harald Jensen, a fisheries official, told broadcaster TV2.

After considering moving or even euthanizing Freya if she were to pose a danger to the public, Norwegian authorities have decided to leave her in peace.

"She is doing well, feeding, resting and seems to be in good condition," Norway's Directorate of Fisheries said.

However, it stressed the need for people to keep a distance and strongly advised against swimming or kayaking near Freya.

"A walrus is not normally a danger to humans as long as you keep a safe distance. But if it is disturbed by humans and doesn't get the rest it needs, it may feel threatened and attack," it said.