These lakes are located in brine pools, which formed during the Jurassic period. During that period, the shallow lakes from the Gulf of Mexico dried out, as a result of tectonic movements in a salt-rich area and perhaps the overall heat in the Jurassic period (it was so hot there were no polar caps). Later on, the 8 km saline layer was covered with sediments and preserved, becoming an underwater lake.
There are actual lakes, on the bottom of oceans, especially in the Gulf of Mexico region; they’ve got their own shores and all. The brine water of these lakes actually hosts unique wildlife, creating an absolutely amazing environment. The fact that these are brine water means that they have an extremely high salinity, way more than the rest of the ocean, which means of course they are heavier, which is why they stick to the bottom.
Cleopatra’s Kingdom, Alexandria, Egypt Lost for 1,600 years, the royal quarters of Cleopatra were discovered off the shores of Alexandria. A team of marine archaeologists, led by Frenchman, Franck Goddio, began excavating the ancient city in 1998. Historians believe the site was submerged by earthquakes and tidal waves, yet, astonishingly, several artifacts remained largely intact. Amongst the discoveries were the foundations of the palace, shipwrecks, red granite columns, and statues of the .
Scuba diver Yoji Ookata started encountering mysterious 'underwater crop circles' in the semi-tropical region of Amami Oshima. He was determined to find the unknown artist of the elegant 6.5 ft wide masterpieces! Underwater cameras finally revealed the pesce Picasso-a tiny puffer fish sculpting a love nest to attract a mate. The ridges attract the lady puffers and the two canoodle and lay their eggs in the center of the circle.