An interesting seed for ocean survival. A small island with a ship and treasures awaits you right at the start. If starting loot is not enough for you, then just keep exploring the surrounding waters and you will find even more islands, and almost everyone will have underwater ruins and ships. Also nearby there is a large mushroom island.
How to use Small Island with a Ship and Treasures seed
Start the Singleplayer mode
Select ‘Create New World’
Then click on ‘More World Options…’
In the ‘Seed for the World generation’ field, enter 998008554293663363