pigmentation

Mr Weston believes this may be due to environmental factors such as light exposure, as hatcheries may be brighter than the seabed, influencing pigmentation.

For decades, Iluka has been mining zircon in Australia - a key ingredient in ceramics, and titanium dioxide used in the pigmentation of paint, plastics and paper.

Officials are urging hunters not to consume any meat from an animal with signs of the blue pigmentation in their meat or fat, and to report the find to officials.

UVA is associated with ageing of the skin and pigmentation as well as skin cancer.

Nasal tanners are designed to be sprayed into the nostrils and are claimed to work by delivering a substance known as Melanotan II, a chemical that darkens skin pigmentation.