SVT Nyheter meets marine biologist Annelie Brand by the sea in Helsingborg. With her is the drone Ola - he is used to document what is hidden under the surface.
- We see mussels and barnacles, among other things. There is a lot of life - we must safeguard it, says Annelie Brand.
"It's a lot of plastic"In addition to documenting life, including fish, the city wants to use the water drone to show the rubbish that is at the bottom.
- Especially at the quayside, it is more than natural that we see - there are cafe chairs, bicycles, empty cans and a lot of plastic, says Annelie Brand.
How do you feel about that?
- It's incredibly sad, it does not belong there, she says.
Watch the marine biologist drive with the water drone in the video above.