Answer: undersea

AnswerCrossword Clue
UNDERSEASubmarine.
underseabeneath the surface of the sea
underseabeneath the surface of the sea
undersealocated, carried on, or used under the surface of the sea
UNDERSEALike Davy Jones's locker
UNDERSEALike some phone cables
UNDERSEALike much plant life
UNDERSEASubaquatic
UNDERSEALike scuba diving
UNDERSEALike Cousteau's work
UNDERSEALike the Titanic
UNDERSEABeneath the Baltic's surface
UNDERSEALike the milieu of the chambered nautilus
UNDERSEASpear-fishing milieu.
UNDERSEALike Cousteau's world
UNDERSEAIn the depths.
UNDERSEAThe Nautilus' realm.
UNDERSEAFrogman's milieu.
UNDERSEASubmarine's habitat.
UNDERSEADescribing Nemo's adventure.
UNDERSEALike some volcanoes
UNDERSEASubmarine
UNDERSEAPhone cable site
UNDERSEALike submarine warfare
UNDERSEALike Atlantis, according to legend
UNDERSEALike a herring's habitat
UNDERSEALike a Cousteau exploration