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Wiktionary
suboceanic

a. beneath the surface of the ocean.

WordNet
suboceanic

adj. formed or situated or occurring beneath the ocean or the ocean bed; "suboceanic oil resources" [syn: subocean]

Usage examples of "suboceanic".

Now he is a businessman, running a suboceanic mining operation whose profits depend on his obtaining Diamalan assistance.

SAA stood for a Suboceanic Acoustic Array, a relic of the Cold War now used by oceanographers worldwide to listen for whales.

There may have been a climatic change that killed off most and drove the few remaining into a subterranean and suboceanic existence.

Helios has gotten the jump on everyone else in suboceanic exploration and development.

The Despacho Fracture Zone had shrugged, and a web of minor faults in the suboceanic basalt had waggled in sympathy.

They twisted like an undersea plant in a suboceanic current, waving and wavering, shifting and combining, straining mightily.