Dave the Diver makes oxygen a claim on the day’s catch

Dave the Diver’s oxygen supply concerns the restaurant as well as the diver. The mobile listing says running out means leaving collected fish and items behind. The day’s catch is something you must bring home, not merely touch underwater.

The same description connects collected resources and sushi-restaurant profits to equipment upgrades. A successful dive can support the evening’s work, and the evening can help prepare another dive. That gives returning with a catch a place in the game’s larger loop.

The decision is whether to keep exploring while oxygen remains, knowing that failure threatens what you have gathered. The listing does not expose the complete salvage rules, so “leaving items behind” should not become an invented claim that every failure erases precisely the same inventory.

If you like management whose supplies come from an expedition you personally steer, examine that return journey. Finding another fish and getting the current catch back are related goals, with oxygen standing between them.