| 名 bottom of the sea; seabed; sea floor |
| 海底矿 submarine mine |
| 海底山 seamount |
| 海底采矿 undersea (or offshore) mining |
| 海底电报 submarine telegraph; cablegram |
| 海底电缆 submarine cable |
| 海底高原 oceanic plateau |
| 海底火山 submarine volcano |
| 海底勘察 submarine exploration |
| 海底生物 benthos |
| 海底水雷 ground mine (or torpedo) |
| 海底峡谷 submarine canyon |
| 海底养殖 bottom culture |
| 海底油田 offshore oilfield |
| 海底资源 seabed resources; submarine resources |
| 海底钻探 offshore drilling |
