I think I saw the jellyfish fish ufo few years back

Jellyfish ufo maybe? Please share your thoughts on what I may have seen.

I saw something like this once I think anyway, it was dark about 3/4am I saw a weird moving object with consistent movement, the edges were jiggling and waving like a jellyfish in water but in the air, the object floated up from the valley/small forest that my garden sits behind, it adjusted its height based on the trees and eventually houses that it went over, like it went just heigh enough to go over the trees/ houses if you get me. Initially I just thought it was some kind of rubbish/garbage bag that got caught in the wind but every tree/ house it seemed it was gonna hit the object gained altitude then reduced altitude based on whatever it was going over, it looked matte black at first that’s why I thought it was garbage but then suddenly it went translucent and I could see the light coming through it from the street lights behind the object, maybe it was something shinning through the object but I swear it was producing red green and yellow colours(not traffic lights 100%), the object floated just over my house and away out of my view, the.thing was literally about 40ft away from me as it passrd over, I couldn’t make sense of it, like when you cant figure out an illusion, y’know that feeling. Ive genuinely no idea what I saw that night, ive never told anyone about it till this post, not family or friends literally no one, only reason I’m posting it is because no one knows me on here. I try to ignore what I saw but it always stays with me in my mind, Ive tried to settle my mind with my own theory it was river foam blown up by the wind but idk. Man the thing moved like jelly fish but in the air,. Hence why this post attracted me here. I’d love. To hear people’s ideas on what I may have seen. I added the pictures because they Inspired me to post this, closest to whatever it was I saw (not my images)