Welcome to Rah'sina Ocean. Roughly translated it means 'poison water,' though in an older dialect.
The ocean is red due to high rust content and is poisonous to most life. When the water of the ocean evaporates it rains down in a distilled form, and is further filtered by the plants native to the planet. This is how animals on P'lodchda get water, through the plants.
The coasts all around are coated in black sand due to volcanic leftovers.
