Colours of the sea
A sea generally refers to a large body of salt water, but the term is used in other contexts as well. Most commonly, the term refers to a large expanse of saline water connected with an ocean, and is commonly used as a synonym for ocean. It is also used sometimes to describe a large saline lake that lacks a natural outlet, such as the Caspian Sea.
The Sea of Galilee is a small freshwater lake with a natural outlet, which is called Lake Tiberias or Lake Kinneret on modern Israeli maps, but its original name remains in use.
The Sea of Cortés is more commonly known as the Gulf of California.
The Persian Gulf is a sea.
The Dead Sea is actually a lake, as is the Caspian Sea and the mainly dried up Aral Sea.
Source: en.wikipedia.org/wiki/Sea - 25.03.2010
Colours of the Sea
How is it possible, that a transparent substance assumes such shiny and manifold shades?