A man deep-sea fishing.
deep-sea 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.
in or of the deeper parts of the sea: deep-sea fishing
deep-sea definition by American Heritage Dictionary
Of, relating to, or taking place in the deeper parts of the sea: deep-sea exploration.