- of, relating to, or occurring at the bottom of a body of water
- of, relating to, or occurring in the depths of the ocean
More from Wikipedia: “The benthic zone is the ecological region at the lowest level of a body of water such as an ocean or a lake … Organisms living in this zone are called benthos.”
The ecopoiesis might have driven other native organisms into extinction, but the invasion from Earth had enabled this ancient benthic species to mount a long overdue invasion of its own.
They’re all here in this corridor, good memories and bad, humiliations and accidents and even small victories, each tableau playing out like the movement of silent, benthic sea life, viewed through the viscous and refractive medium of the years in between, in some cases dim and obscured, and others relatively clear, but never completely transparent, at best suggestions, outlines, emotions and echoes, impressions as relived through the deepest and darkest of waters.
Definition from Merriam-Webster