Coral reefs around the world are in serious trouble from pollution, over-fishing, climate change and more.=( The last thing they need is an infection. But that's exactly what yellow band disease (YBD) is — a bacterial infection that sickens coral colonies...

The effects of yellow band disease (YBD) can be seen on the coral Montastraea (A and C) and Diploastraea (B and D), which are found in the Caribbean and the Florida Keys, and the Indo-Pacific, respectively. Researchers found that YBD seems to be getting worse with global warming. (Credit: James Cervino, Pace University)