The bottom here is too deep for natural diving.

Probing the Animals' Prowess To solve the puzzle, the researchers will ask the animals to simulate their natural diving and foraging patterns in the ocean, but to do so in such a focused and well-timed fashion that the scientists can track precisely what is going on in the animal's body from one dive to the next.

Naked Diving for Mother-of-pearl.

From 1866, he was also involved in the pearling industry at Nickol Bay where 'naked diving' (i.e. without any aids including goggles) became the norm.

In the meantime 'naked diving' continued with most producing exceptional results especially at the Flying Foam Passage where they used the tides to allow themselves to travel over great distances.

Called 'naked diving', the methods used are described in two primary sources, one the diaries and official dispatches of Resident Magistrate and pearler R.J. Sholl and secondly the better-known and widely-published accounts of E.W. Streeter.