Have you played Subnautica Subzero? I can't stop thinking about a specific creature from the game known as a vent garden while looking at this, its area has similar colors and it is also a huge creature. Granted, its a jellyfish and is actually dramatically different, but your girl here has the same kind of cool vibe as it (at least to me haha.)
Oh! No I never played nor watched a full gameplay so I never saw that creature you mentioned I only know of that very long creature that scared YouTube's so I never even picked up the game cuz I always thought it's a horror game xD
It certainly can scare you, but that's moreso because a *lot* of people fear underwater things. It can actually be very relaxing as well, as long as you aren't in the territory of anything big and hostile, and is a survival exploration game. I've watched a friend of mine play through both, and find it gives me a fair amount of ideas about underwater settings.
I only know of that very long creature that scared YouTube's so I never even picked up the game cuz I always thought it's a horror game xD