The statement “Coral
bleaching occurs when a colony of polyps are under stress” is true.
When corals are stressed by changes in conditions such as temperature, light, or
nutrients, they expel the symbiotic algae living in their tissues, causing them
to turn completely white.
I am hoping that this answer has
satisfied your query and it will be able to help you in your endeavor, and if
you would like, feel free to ask another question.
