https://www.polygon.com/2018/10/29/18037744/no-mans-sky-abyss-update-release-date

Today the team at Hello Games is launching a massive new update for No Man’s Sky. Called The Abyss, it focuses on expanding gameplay in underwater environments.

Following the release of the Next update in July, Hello Games has rolled out a number of smaller updates, including additional cosmetic options, vehicles and more. The Abyss is, so far, the largest of those updates. According to a news release, it includes five new underwater biomes and a host of additional features to allow players to explore and inhabit aquatic environments.