What is more usefull to explore unexplored sea or unexplored space?

Space has a lot of resources. Its more difficult of course, but on the long run, space, as the name says is what the growing population of earth will need the most. We are already more than 6 billion. Unexplored sea will be covered first, simply because it is easier, but space will prove to be more usefull. Now science is looking for planets and chances are that some day we´ll find several planets similar to earth with thousands of unexplored seas.

Really good question. Since there is no way I could answer it to satifaction, that is with a completely right answer, let me say space. On the basis that it seems like despite mankinds generally good intentions most of our explorations end with exploitions, manipulations, and eventually ruin. Perhaps space will be big enough to avoid all the horrible things I can imagine us doing to the sea if we discover something in it that we want out.

the sea because even though we might not be able to get to some of it's depths. We can get down really far. maybe not man. but robots with cameras and that's really good. Plus there is less sea than space. and it's easier to loose things in space and break things in space. It's just too big.

The sea, because it's part of our own planet, and it's full of life. There's much more down there that can be used and useful to us. There's nothing in space we can actually use.

The study of space satisfies curiosity more than a need, and usually that study leaves us with more questions than answers.

Things in the sea we can touch and hold and retrieve and gain knowledge of whether it might be good for food or medicine, etc.