Underwater World By Alexander Safonov

Beautiful photos of underwater world by Alexander Safonov. He is also professional software architect living and working in Tokyo for many years. He is originally from Voronezh, Russia. Currently he provide independent IT consulting services for financial companies in Japan. His primary expertise is design and implementation of real-time distributed information systems. His biggest hobby is underwater photography. In last few years he has traveled extensively and photographed marine wildlife in many exotic diving spots around the world. His images won several prestigious international contests, and appeared in many publications worldwide including BBC Wildlife Magazine and National Geographic.
Underwater is a term describing the realm below the surface of water where the water exists in a natural feature (called a body of water) such as an ocean, sea, lake, pond, or river. Three quarters of the planet Earth is covered by water. A majority of the planet's solid surface is abyssal plain, at depths between 4,000 and 5,500 m (13,000 to 18,000 ft) below the surface of the oceans. The solid surface location on the planet closest to the center of the orb is the Challenger Deep, located in the Mariana Trench at a depth of 10,924 m (35,838 ft) under the sea.