Huge,kind of dark see through craft or projection which held direction, circular patterns underneath on flyby….Silent, almost invisible. But it was something…I’ve never seen such a stealthy visual object…don’t know…that’s why I’m just unsure, but needed to report. Looked like a giant sting ray floating by, with circular colored pattern. IDK man..Mirabeau Park area supposedly hosted Jurassic type dinosaur creatures. I’m educated, with multiple degrees in electronics and audio…or call me incompetent. I know what I saw. Peace on earth.