Moray eels, or Muraenidae are a family of eels whose members are found worldwide. There are approximately 200 species in 15 genera which are almost exclusively marine, but several species are regularly seen in brackish water, and a few are found in fresh water. (https://en.wikipedia.org/wiki/Moray_eel)
Rate of occurrence of disease or other health disorder within a population, taking account of the age-specific morbidity rates. (IPCC. 2001. Climate Change 2001: Synthesis Report. Annexes. https://www.ipcc.ch/site/assets/uploads/2018/03/annex.pdf)
