I made some robotic jellyfish and I’m pretty pleased with the result.
Well, they don’t look really robotic. And the rocks seem a bit sharp (not smooth). But it still looks good. I like it.
Make the jellies glow in a machine-y sort of way. Could be cool.
try adding robotic joints to the tentacles and on the dome add rivets and metal plates.
I like this, jellyfish-like but obviously machines, but a few lights under the domes may look cool.
The tentacles look really funky. I think your should make them look more like those of the Matrix’s Sentinel machine.
Aside from that, I agree about the glowy lights, rivets etc… but it’s a good concept, just needs some teaks to make it look more robotish.