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(oceanography) Describing a pelagic zone of the oceans between the photic epipelagic and the aphotic bathypelagic zones quotations examples
For those animals living in the mesopelagic zone, where some light downwells from the surface, a visual predator looking up at them could see a silhouette.
2001, James Willard Nybakken, Marine Biology: An Ecological Approach, page 153
plural mesopelagics
A mesopelagic fish examples