Why does Greece not have tides?

The Atlantic Ocean enters the Mediterranean Sea through the narrow Gibraltar Strait. As a result, the Mediterranean Sea has almost no tides, which means that coastline construction has historically been situated very close to the water—closer than in other coastal countries directly exposed to the daily ocean tides.



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Water is exchanged at the slowest of rates making the med as clear as a swarovski crystal. Limited water exchange = limited food for tiny organisms called phytoplankton aka algae, and it's these little dudes who play the lead role in water clarity. The Mediterranean is classified as “oligotrophic”.

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The Weddell Sea has been claimed by scientists to have the clearest waters of any ocean in the world. Described by a historian as “the most wretched and dismal region on earth”, due to the flash freezes that caught Shackleton's ship, its clarity is only belied by the sheer depth of the ocean below.

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