How do i get the sea to move with it's clone while reappearing in the position of the clone after going offscreen?

How do I...?
2

You’ll have to give more context, but I’m assuming you’re scrolling the sea sprite? If it’s just the same image moving, consider using a tiled sprite and changing the x-offset to “move” the sea. It’s a lot less work and hassle than moving 2 sprites around in synch.

Here’s a link to a post explaining how to achieve this.