I mean it's the color of night, it's the color of the ocean and as a scuba diver I've spent a lot of time looking into the deep blue, the pelagic blue.

这是夜晚的颜色，是大海的颜色，我喜欢潜水，常花许多时间观察海洋中的深蓝色，这是深海的颜色。

youdao

Walsh spent eight years in academia. The retired Navy captain continued to pursue his passions as a scuba diver, private pilot and explorer, participating in dozens ocean dives and expeditions to the polar regions.

VOA: standard.2010.06.21

The first one focused on helping ocean bound private boats remove barnacles from their hulls by sending a diver into the water below the boat with a high pressure hose.

FORBES: Barnacles, Diamonds and Cows: 5 Startup Failures--My 5 Lessons Learned