Subnautica

Subnautica is a fantastic game where you play the role of one of the few survivors who crashed on a water filled world.   You gather resources and use various tech tools to fabricate underwater survival environments and avoid the gigantic leviathans that inhabit some of the scarier zones.

Playing this had the same thalassophobic effect that Beyond Blue had -- but it was justified.  There were growls and stalkers and glow in the dark poison pincer jellyfish, and throughout the game you are uncovering other survivor capsules that have been ripped open to recover their datapads and find patterns of things you can then build into your habitats and ships.

There creatures are done so well, you feel like you are intruding on their territory - but unlike a "dungeon monster" won't chase you to the ends of the earth just because they see you.   Interfere with some of the bigger or get in the way of their hunting or be the size of their prey though and ...

Play it.  I'm really looking forward to playing the sequel ... I just need ... some less, terrifying 1200m deep caverns with active lava vents and patrolling warpsquids or dragon leviathan games first.