We removed 11 pieces of debris weighing a total of .15 kg from Shangri-la Marine Sanctuary off Mactan Island in Cebu, Philippines.
This was my 2nd dive to 40 meters for my Deep Diving specialty and, perhaps because relatively few divers go this deep, I have found 30-40 meters to have more debris, on average, than more-frequently-travelled shallower depths. This makes me worry about even deeper depths.
My instructor, who it was my first time diving with, was amazed by my ability to detect debris. She said after the dive that every time she looked around to make sure I was still with her that I was picking up debris 5-10 meters away. (https://scubadivingzero.wordpress.com/2018/06/04/deep-diving-2/)
One piece, which is hard to make out in the photos, was some kind of thin wooden frame covered in tissue paper. It fell apart as I tried to put it in the mesh bag and it fell apart even more in transit to my home scale. I didn’t have a camera with me, but the original piece was a very strange object to even have on a boat, let alone drop from a boat.