suboceanic[sub′ō s̸hē an′ik]
suboceanic definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
situated or occurring on or beneath the ocean floor
suboceanic definition by American Heritage Dictionary
Formed, situated, or occurring beneath the ocean or the ocean bed.