Big battle in the Pacific! Octopus vs Moray eel - Who will be the winner?br Moray eels, or Muraenidae (ˈmɒreɪ or mɒˈreɪ), are a family of eels whose members are found worldwide. The approximately 200 species in 15 genera are almost exclusively marine, but several species are regularly seen in brackish water, and a few are found in fresh water.