Whilst nowadays most underwater shooters do their white balance correction during postproduction of images, there are still many shooting situations (such as several different light sources present in one shot) in which doing it “old school” comes with clear advantages and optimized workflow.
The Chinese government has imposed a 10-year commercial fishing ban in the Yangtze River to combat "across-the-board" declines in the populations of rare species like the Chinese sturgeon.
As it came into effect on 1 January 2020, it is hoped that the ban will tackle the problems of dwindling fish stocks and declining biodiversity in the 6,300m river. It will be applied at 332 conservation sites along the river and be extended to cover the main river course and key tributaries by 1 January 2021.
The Australian authors—Dr Neil Banham (lead) and Dr John Lippmann—reported that a 26-year-old healthy male freediver dived to 10m (32.8ft) where he met a friend who was diving on scuba. The freediver breathed from a scuba regulator before ascending.
It may have been that he held much of his breath during ascent, which would have been his usual and generally safe practice with normal breath hold diving. — Banham, Lippmann
What we see is that sharks are being targeted by international factory fleets around the world who trail millions upon millions of baited hooks through their realm, trawl the sea floors for rays, skates and other bottom dwellers to 4,000 metres, and slaughter them by the millions. Sharks are the only profitable prey remaining, now that ninety percent of the original (fish) fisheries are fished out.
