Here's a screen capture of nudis and their eggs from the Blue Heron Bridge, Phil Foster State Park, Riviera Beach, Florida USA:
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The Nudibranchs are Flabellina Dushia (thanks to Anne D. for the ID!) and are about 5/8" (1.6cm) in length.
I used the new ReefNet diopter adapter and a +10 SubSee diopter on the Gates AX100 housing. The Sony AX100 has firmware v3.
The tiny spiral of eggs is clearly visible, making the individual sand grains look like large boulders!
Ask me if I'm sold on 4K LOL
PS: The (absolutely horrible) video is on Youtube at https://youtu.be/1NtMt7f0CjU I will get better, I promise - it was my first try at using a diopter...