This project arised from the Blenderartists Weekend Challenge Under the sea.
Back then I had to rush it to get something. But I liked the idea, worked a little bit longer and then let it sleep for 9 months. Now I took the time to finish it up. Not without flaws but good enough for me to let it go.
Blender 3.3 (But I worked mostly in Version 2.93 for this). Cycles, 256 Samples + Denoising. Used Gimp to add small dustclouds and to darken the corners.