Though we always think of the sea as being blue in colour, the water of the Red Sea has a slight reddish tinge to it, because of the algae that lives in this sea. This algae clouds and muddies the blue water.
The Black Sea contains a lot of hydrogen sulphide, which gives the water a blackish tinge. Being further north than the Mediterranean Sea and much less salty, it also contains more micro algae, which makes its deep waters very dark.
|
