Here is a creature that I designed for one of my VR experience. It started off as a space based theme, but not I am shifting it to an underwater environment.
For this piece I was once again using Maya, ZBrush, Substance Painter and then pushing to Sketchfab. I also wanted to try out animating within Sketchfab, it works really nice, only problem is there is very low bone limit when viewing on a mobile device. On my IPhone, Apple has set a very low bone limit (about 20 animating bones) if the count is too high then it just renders the characters bones and you will no longer see the skinned mesh. Kinda a bummer, but at least I know the rules now! :)