I owned a collecting station in Hawaii for 10 years. Dove 5 days a week, 5 tanks a day collecting fish for export. Deepest dive ever .......251 feet on a single 80 cube bottle. Off the drop many Tinkeri Butterflies, flame wrasse, and Holo Holo angels(Banded angels). At 250 feet, looks pretty much like the Moon, just boulders the size of cruise ships with almost no growth, very "odd" looking fish. no color at all at that depth.
Pretty amazing breathing doing 251 on that tank including deco stops my friend. I applaud that for sure.