Coral die-offs—caused by a process known as bleaching—tend to look as bland and lifeless, in contrast to the vibrant rainbow colors of thriving coral. Bleached coral reefs usually appear as an ...

Colors range from dark gray and brown to more ... a family of algae that creates nutrients for the coral by converting sunlight into energy by way of photosynthesis. In exchange, the algae get ...

The corals, full of color just days before, were bleached. As she dove closer, she realized many of the colorful coral left were burned to death: They had died so quickly that they didn’t even ...