In the face of these challenges, we still have a window in which to stop the “rainforests of the sea” from disappearing altogether. Corals are bleaching and dying primarily because the Ocean is warming at an alarming rate, as evidenced by the sheer scale of this Fourth Global Bleaching Event. Corals bleach when environmental stressors such as heat cause them to expel the colourful, energy-producing algae that live inside them, https://www.hogwartsishere.com/1788909/ leaving them white.