Answer: deeps

AnswerCrossword Clue
DEEPSOceans and seas
DEEPSBathyspheres explore them
DEEPSFathomless waters
DEEPSOcean features
DEEPSOceans, poetically
DEEPSAreas explored by submarines
DEEPSLiterary oceans
DEEPSOceans, to Longfellow
DEEPSFathom measures
DEEPSBathyscaph's milieu
DEEPSSeas, poetically
DEEPSOcean troughs
DEEPSMarine abysses
DEEPSChasms in the Black and White
DEEPSAbysses
DEEPSOcean soundings
DEEPSOceans of poetry
DEEPSOcean chasms
DEEPSLanternfish's home
DEEPSLanternfish milieu
deepsintense
deepsDEEP, the place far down under the sea
deepsa vast or immeasurable extent abyss
deepsdark
deepsobscure
deepsat great depth
deepsextending far down or in
deepsdifficult to understand
deepsdeep part
deepslow in pitch
deepsinvolved
deepsean
deepsgenerally long and narrow area in the ocean where the depth exceeds 3000 fathoms (5500 meters)
DEEPSCaves of ocean.
DEEPSBack-up, over the limit
DEEPSOcean trenches
DEEPSUndersea regions
DEEPSOceans, to poets
DEEPSBathysphere's milieu
DEEPSOceans, in poetry