Måsstaden under vatten (Swedish: "Seagull town underwater") is the second studio album by Swedish progressive metal band Vildhjarta, released on 15 October 2021. It is their first studio release in eight years since the Thousands of Evils EP, and was released nearly ten full years after their debut album, Måsstaden, the concept of which is further explored on this album. Måsstaden under vatten is the group's last album to feature bassist and founding member Johan Nyberg and the first with drummer Buster Odeholm who also produced, mixed and mastered the album.