OceanSurvival-v1.zip is a release file of the Minecraft map Survive in the Sea!, made for Minecraft 1.13. It was published on August 22, 2018 and is 5.7 MB in size. For the full description, screenshots and every other version, visit the Survive in the Sea! map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.