Terror with an underwater or oceanic theme or setting?

Ships, cargo ships, submarines, oil platforms, diving suits, underwater cables, quasi-infinite bodies of water, feelings of isolation, loneliness, abandonement, vulnerability, helplessness, etc.

The source of terror can be anything, as long as the atmosphere I am referring to is maintained, although the more prominent the oceanic/maritime context is in that terror, the better. Similarly, I would like it to be a harsh, raw and serious book. In English or Spanish, both are fine.

Thanks in advance!