Can you make an artificial ocean?

[Thomas Devlin]

I've got a pretty extreme idea for a build that involves removing the entire ocean and rebuilding it further inland, but I'm not sure what the exact qualifications for an artificial ocean are, or if you can even build one

[Eighteen-Counts Trevor]

I'm pretty sure the ocean is just always at the edge of the world

[Duchess Minty]

Yeah the Ocean is a specified section of the very outer edge of the world, you can't move it.

[Mr. Unregistered]

Originally posted by Thomas Devlin:

I've got a pretty extreme idea for a build that involves removing the entire ocean and rebuilding it further inland, but I'm not sure what the exact qualifications for an artificial ocean are, or if you can even build one

Even mining every block (or water), the Ocean is still there and you know it because of the music and background. Same as Hell.

[Stimky]

Check the terraria wiki, the guidelines for artificial biomes are very easy to find. Here is a link to the wiki page for artificial biomes https://terraria.fandom.com/wiki/Guide:Artificial_biomes#Ocean

Here is the entry for making an Ocean:

The Ocean is the border of the world, and it is located in the world edges. It is a large body of water, with a small beach (in which you can farm and replant Palm trees) in its border.

The floor must be made of Sand at least one block thick. Pearlsand, Ebonsand, or Crimsand does not count.
There must be 2 or more tiles of Water atop the sand for Ocean monsters to spawn.
7 or more tiles of water for Coral to grow.
This must be positioned within 250 blocks of either edge of the map.
This must be above a depth of 0, so within the Surface or Space layers.
There must be 1,000 tiles of connected liquid in order to catch ocean fish.
Cannot use lava, honey or other liquids besides water.

Hope this helps! happy adventuring to you!

Edit: If it comes down to it, you could always T-edit the world file and force the biome to be ocean at your building area. No shame in breaking the vanilla restrictions to do something that wont really effect your game in a meaningful way