wtf is this? fairy ghost orb wisp? tinkerbell?

Not sure what this is but I'm open to suggestions. Basically I was in the middle of a river on a small little island. Started recording and after a minute this thing popped in. Thought it was a bug but I couldn't see anything but I could see this on the screen as it recorded. Thought maybe a glare but it held its shape in and out of frame then thought maybe some infrared but nothing was around just nature so idk don't care if its a fairy or not just thought it was cool hope you enjoy