I would love to get the physics efficient and stable enough for that! I've had a dream of making a twitch stream of that kind of aquarium full of the creatures people upload to the server.
I would definitely watch that, love these little guys. I guess while I have you here I have one note and one suggestion.
The note is I can't seem to see, on standalone or embedded, uploaded creations past page 56, entry 1000, which ends in the middle Gs.
The suggestion is, and I don't know how easy or possible it would even be, I would love to limit color vision on eyes so that a creature could potentially recognize and avoid predation or sharing space on its own kind, which also opens up mimicry through camouflage.