The aphotic zone (Greek, without light) is the portion of a lake or ocean where there is little or no sunlight. It is formally defined as the depths beyond which less than 1 percent of sunlight penetrates.
Tigaki is located 11 kilometers far from Kos town and 7 kilometers north of Asfendiou village in Greece. It is a small resort known for sandy Barracuda and Lenas beaches.