What Was The "Jellyfish-Like" Drone Swarm The Downed F-15E Pilot Reportedly Saw Over Iran?

One source described the Strike Eagle pilot seeing a “minefield of drones” in the skies over Iran, before their jet went down. - Thomas Newdick, Tyler Rogoway

Now, the reported testimony of the Strike Eagle pilot involved describes a ‘jellyfish-like’ swarm of drones in the sky, moments before they ejected from the stricken jet.
According to a report from CNN, the pilot recounted seeing “multiple Iranian drones hovering in the air, moving as one, in a formation that resembled a jellyfish.”...