undersea
A subsea cable delivers the energy to where it is needed.
Subsea oil wells are located below the ocean floor.
Global warming may cause Siberia's subsea permafrost to thaw.
On the ocean floor, the submarine's floodlights revealed entirely new ecosystems living near the subsea volcanic vents.
SMART Vocabulary: related words and phrases Seas & oceans
abyssal
Aegean
bathypelagic
briny
Caribbean
continental shelf
depth
guyot
interocean
interoceanic
marine
mid-ocean ridge
ocean
pond
the Adriatic Sea
the Arabian Sea
the Baltic Sea
the doldrums
the Irish Sea
the seabed
You can also find related words, phrases, and synonyms in the topics:
Civil engineering in general