Photo date: March 17, 2020. Photographer: Mark Mahin.
I took the photos below while photographing only ordinary drops of pure, clean water falling in front of a black featureless background. On this day I got hundreds of photos that each showed four or more orbs with a semi-circular orb hole. Below are some examples. I have got very many of these semi-circular orb holes on quite a few previous days, as shown here.