please provide the name and biology

Diana3118

Dear experts! There is some kind of nekton on the aquarium glass... it looks like a small jellyfish, I can't take a photo. I drew something similar... please help identify it. It appears to have a transparent body with white inclusions. It moves independently in the water column.

Jill1815

Even some aiptasia have such a stage. - it won't survive.. or it will settle somewhere as a polyp/hydroid... scyphozoans will definitely eat it.. with stones in the herbarium, a handful of similar jellyfish larvae arrived - they disappeared in a month.. Added after 43 seconds Does it react to the light of a white flashlight at night?