mesopelagic
definition
of or relating to the mesopelagic zone of the ocean which extends from 200 to 1000 meters depth
example
Researchers have discovered a variety of unique mesopelagic organisms that thrive in the dark waters between 200 to 1000 meters deep.
synonyms
midwatertwilight zonedeep sea
word origin — The word 'mesopelagic' comes from the Greek 'meso-' meaning 'middle' and 'pelagic' meaning 'of the sea or ocean', thus referring to the middle layers of the ocean.