Zanzibar dhow

Whilst travelling RTW in 1998 and 1999 I visited the eastern beaches of Zanzibar which are very shallow coral white beaches wth sand as fine as custard powder. A sudden squall whipped up the sea and then blew itself out but the sand hung in suspension in the water turning it to the colour of milk. As if by magic a single red sailed dhow passed by and a twist on the polariser intensified the colours.