These samples were a camera lens test in 1989.

Photographed in the Tweed Heads river at high tide, when the clear ocean sometimes floods in.

Other locations for guaranteed clear ocean modelling pictures:

1. The warm to 'hot' fresh water springs at Howard Springs, Australia's Northern Territory (ideal during the southern winter).

2. The Coral Sea - outside the Great Barrier Reef where visibility is always 120 to 250 feet (requires lengthy charter boat voyage). Best time April and May. September and October.

3.Mount Gambier's Ewen Ponds- crystal clear freshwater in South Australia (but very cold water therefore wet suit required).