This was the G55, but as Humu noticed, being a super macro, have two problem to consider:
Every small movement of the camera, will be enlarged on the video, that's why I decided to buy a tripod and try this way.
Another aspect of the G55, Is the depth of field that is just from 4.8 to 6.2 cm (1.9 - 2.4 In), so you need to go really intimate with your subject.
When you are able to overcome these 2 problem, it gives you footage from your GoPro, that I would never have think possible.
G100 is a bit easier and forgiving, having a DOF from 7 to 15.2 cm (2.8 - 6 In) but also has a lager fov of 90°, while the G55 has 45°.
This fov difference, allow the G55 to have a 2x zoom Vs the G100.
For this video, I used the G165, that lose another 2x Vs the G100, but is even easier to use (10 - 35 cm) because the subject was big enough (10 cm~) and I did not had time to change the lens, because my guide literally came back free diving to take me out of the water 😂
I made him a bit angry, I had to offer a drink 🫣