On Sweden's west coast lies the Western Sea with Sweden's saltiest water and the largest marine biodiversity. The Western Sea includes both Kattegat, Skagerrak, and the Øresund and is home to species such as mackerel, kelp, octopus, sea stars, corals, dolphins, and a total of 17 species of sharks.
The invasive species that was previously called havsspya (sea vomit) has been given an official name: filtsjöpung
