The citizens of Thessaloniki strolling along the port of Thermaikos were in for a surprise, as the waters had turned red. The natural phenomenon, which is known as the “red tide”, is created from a rapid development of uni-cellar photosynthetic plankton organisms. It is phenomenon that appears on a regular basis in Thessaloniki, which results in reddish spots on the water surface. Apart from the strange image, those planning to take a walk along the port will be hit buy a strong unpleasant stench.