It was sunny today. In class, we focused on marine science. Coral reefs are actually clusters of very small organisms called coral polyps. They cannot survive alone. Plant-like algae live inside the coral and perform photosynthesis, converting sunlight into food for both themselves and the coral. However, when pollution occurs or the water temperature rises too much, the algae can no longer produce sufficient food, and the coral ejects them. This breakdown in their relationship leads to coral bleaching, where the coral loses its color. Overall, the ocean is more vulnerable than we might have thought.