Scientists studied 2,500 coral reefs to figure out how to save them

(CNN)An international group of scientists has surveyed more than 2,500 coral reef systems across 44 countries to determine how to save them in the face of damage caused by climate change and humans, according to a new study.

A hundred scientists were involved in the survey that looked at coral abundance in the Indian and Pacific oceans. Many of the reef systems were found to be full of complex species that created distinctive structures and were functioning in spite of deadly marine heat waves in recent years.