Although we list five oceans, the lines that divide them on the map are mere conventions.
(a) The natural world does not follow such boundaries sea water constantly flow across different oceans. Many plants and animal species can be found across multiple oceans.
(b) Marine fauna consists of thousands of colourful fish, dolphins, whales, mysterious sea creatures. Each part of ocean has its own diverse life forms from sun-lit surface to the dark depths but through pattern
of migration many can be found – across oceans.
(c) Moreover if we look at the map carefully, they are connected some via the Arctic Ocean and some via the relatively narrow gap between South America and the Antarctica.