In the deep waters of the ocean, coral reefs are found in abundance. algae live within these coral reefs, producing pigments that give corals their color and providing nutrients that corals need to survive. in return, corals offer shelter to the algae. so, coral and algae share a association. a. mutualistic b. commensal c. parasitic. climate change has led to increasing ocean temperatures, which can cause corals to expel the algae living inside of them. this phenomenon is known as coral bleaching because it causes corals to lose the pigments produced by the algae. coral bleaching will lead to a. a decrease in number of corals. b. an increase in the number of corals. c. an increase in the number of algae dependent on corals.