Coral bleaching is a big problem in the coral reef ecosystem. The main issue with coral bleaching is the algae leaving the coral and not being able to filter the sunlight into nutrients the coral needs. Coral bleaching can happen for multiple reasons, the first being climate change, climate change is the most common cause of coral bleaching, it happens when the pollution from factories, cars, etc. causes the temperature to rise, and oceans absorb 93% of climate change heat, the heat then causes the algae to expel off of the coral leaving the coral vulnerable to diseases. Another cause of coral bleaching is high tide, and the waves rub all the algae off of the coral. The affects of coral bleaching are not deadly to the coral, but can leave the coral more susceptible to disease, cause reduced growth rates, and decrease reproduction. Coral reefs are some of the most biodiverse ecosystems on the planet, so thousands of animals, plants and organisms rely on the coral being there to suit their living needs. Coral bleaching doesn’t affect anybody other than coral harvesters and collectors, however, collecting and harvesting coral is illegal because it destroys and disturbs the ecosystem around it.