Subnautica inspired concept - The Jolly Caves

Given my strong love for biology and videogames with lots of exploration, I couldn't refrain from letting Subnautica inspire me to create an environment of my own. In the future I'd like to add a couple more concepts for an architectural entrance to the secondary caves and another creature.
I've been watching some documentaries to prepare for this project (one can never have too much knowledge) and I have to say: deep sea creatures are truly fascinating.