Stretching from the Atlantic Ocean, you will find the Mediterranean Sea, with a great diversity of fish species due to its nutrient-rich waters. In fact, about 9% of the world’s marine biodiversity is located in this sea. Some of the most well-kept secrets in the Mediterranean Sea include dive sites such as Cabo de Gata in Spain, The Bay of Agay in France, Turtle Island in Greece, Sardinia in Italy and even Blue Cave Oludeniz in Turkey. You will see triggerfish, tuna, grouper, and barracuda. Other popular activities include wreck diving in WWII ships, as well as swimming with wild dolphins, manta rays, and sharks.