Zoo store manager Eva Modig: "Do not swallow aquarium fish"

Student challenges where students get different points for what they do have led young people to go to the pet store to get aquarium fish.

"Swallow a goldfish" is one of the challenges of the coming weeks.

Now Eva Modig's zoo shop has put up special signs in the shop where they warn of the consequences.

And anyone who wants to return a goldfish so as not to risk getting parasites is more than welcome, she says.

Hear Eva Modig tell more about the students who want to buy fish and the dangers of the challenge in the video.