Do you like the Minecraft ocean? If you like that, you'll love this map! On Sea Survival will be generated only ocean around the world, and nothing more than ocean! Do you think that you can survive? TRY IT NOW!

You will spawn on that for not drowning when you start.

And you'll have this items from the bonus chest to start.

Near to the spawn, you'll find some of warm ocean.

After, you'll find only ocean, this will be on the generated and new chunks.

NOTE: Minecraft 1.17 really loves the mountains, it loves the mountains so much that it'll generate mountains on the ocean biome, as you can find this really near to the spawn, so... this won't be only ocean at all...

as a result of the above, I have decided to make a villager's house near the spawn, you can find them quietly living in their house.

For finishing, note that the world has achievements enabled and locked the world configuration, so you can't change nothing, only the multiplayer section.