Ash Sea
This deep ocean is home to a colony of ocean horses and is located to the north of Astillica, meeting the city's shore at the Dark Mountains. Despite Utopia's seas being very secretive and un-explored, the Ash Sea is famous for being the location of the crash site of the Salvatorem (the ship the brought the humans to Urtisia). The ship exploded into ash, hence the name, a day after it crashed and the humans named the sea so in memory of their old planet.