Constantinos Petrinos / Sunset reflected on the surface of the Aegean Sea on a calm day with a speedboat, Evia Island, Greece. July 2014.

Nick Upton / Mourtia beach and bay with the southeast tip of Samos and Mount Mycale in Turkey's Dilek Peninsula National Park in the background, east coast of Samos, August 2011.

Nick Upton / Great capricorn / Great oak longhorn beetle (Cerambyx cerdo), one of the largest beetles in Europe, on tree trunk, Lesbos (Lesvos), Greece, June.

Nick Upton / Shoaling young sardines (Sardina pilchardus) swimming in shallow water in a sandy bay, casting shadows on the seafloor, viewed from above water. Eastern Lesbos / Lesvos, Greece, August.

Dimitris Poursanidis / A researcher collecting data from the seagrass meadows (Posidonia oceanica), Sigri, Lesvos, North Aegean. The continous monitoring of the ecological status of the seagrass meadows is an inherent part...

Dimitris Poursanidis / Berried anemone (Alicia mirabilis) attached to a blade of Neptune seagrass (Posidonia oceanica), Skyros, North Aegean, Greece

Dimitris Poursanidis / Close up of the leaves of Neptune seagrass (Posidonia oceanica), Skyros, North Aegean, Greece.

Dimitris Poursanidis / The Noble pen shell (Pinna nobilis) is the largest bivalve that lives in the Mediterranean. It is mostly found in seagrass meadows (Posidonia oceanica), Skyros, North Aegean, Greece.

Dimitris Poursanidis / A school of Mediterranean chromis (Chromis chromis) swimming above Neptune seagrass (Posidonia oceanica) meadow, Skyros, North Aegean, Greece.

Dimitris Poursanidis / Neptune seagrass (Posidonia oceanica) meadow, Skyros, North Aegean, Greece

Dimitris Poursanidis / Sea cucumber (Holothuria tubulosa) in seagrass meadow. Skyros, North Aegean, Greece.

Dimitris Poursanidis / Balls of fibrous material from the foliage of seagrass meadows, called egagropili, form due to the action of the sea and currents. Skyros, North Aegean, Greece

Ashley Cooper / Life jackets and remains of boats left by Syrian migrants, refugees fleeing the war. Lesvos Island, Efthalou, Greece. September.

Ashley Cooper / Syrian migrants, refugees fleeing the war, Lesvos Island, Greece. September 2015.

Ashley Cooper / Life jackets and remains of boats left by Syrian migrants, refugees fleeing the war. Lesvos Island, Efthalou, Greece. September.

Ashley Cooper / A solar power station on Lemnos, Greece. September 2012

Ashley Cooper / Solar thermal panels heating water for a holiday complex in Myrina on Lemnos, Greece. September 2012

Ashley Cooper / Old traditional Greek cloth sailed windmills in Kontias on Lemnos, Greece. October 2012

Ashley Cooper / Old traditional Greek cloth sailed windmills in Kontias on Lemnos, Greece. October 2012

Pascal Kobeh / A diver in front of antique pieces of pottery in Pyrgaki Bay where a boat of ancient Greece went down, Paros Island, Greece, Aegean Sea

Pascal Kobeh / A diver in front of antique pieces of pottery in Pyrgaki Bay where a boat of ancient Greece went down, Paros Island, Greece, Aegean Sea

Pascal Kobeh / Antique pieces of pottery in Pyrgaki Bay where a boat of ancient Greece went down, Paros Island, Greece, Aegean Sea

Pascal Kobeh / A diver on the Mariana wreck, Paros Island, Greece, Aegean Sea

Pascal Kobeh / A diver on the Mariana wreck, Paros Island, Greece, Aegean Sea

Pascal Kobeh / A diver on the Mariana wreck, Paros Island, Greece, Aegean Sea

Pascal Kobeh / Striped bream or Sand steenbras (Lithognathus mormyrus) caught in a fishing net, Paros Island, Greece, Aegean Sea

Pascal Kobeh / A diver in Mesa Pigadia area, a rocky and caves area made with lava structures, Santorini Island, Greece, Aegean Sea

Pascal Kobeh / Scuba divers in Mesa Pigadia area, a rocky and caves area made with lava structures, Santorini Island, Greece, Aegean Sea

Pascal Kobeh / Divers on Palea Kameni wreck located in Santorini caldera with pieces of probably recent pottery laying on the bottom at the front of the ship, Santorini Island, Greece, Aegean Sea

Nick Upton / Two Western Caspian pond turtles / Balkan stripe-necked terrapins (Mauremys caspica rivulata) swimming in a pond with their heads above water, Isle of Lesbos / Lesvos, Greece, May.

Constantinos Petrinos / Discarded condom floating on the coast of Mykonos Island. These may be mistaken for jellyfish by sea turtles. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic trash littering a beach near Mykonos town, Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Rubbish dump. Garbage disposal and recycling, is a major issue in all Greek islands. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Rubbish dump on Mykonos Island. Garbage disposal and recycling is a major issue in all Greek islands. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic litter on a beach near Mykonos town. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic litter on beach near Mykonos town. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic litter on a beach near Mykonos town. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic litter on beach.Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic litter on beach, Mykonos town. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic litter on beach, Mykonos island. Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Plastic trash litters on beach, Mykonos island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007.

Constantinos Petrinos / Detail of the coloured birding ring on a young male Griffon vulture (Gyps fulvus fulvus) shot subsequently treated at the Aegean Wildlife Hospital. This bird was ringed prior to release by WWF Greece,...

Constantinos Petrinos / Young volunteer with male Griffon vulture (Gyps fulvus fulvus) during release. This bird was shot and subsequently treated at the Aegean Wildlife Hospital, and released by WWF Greece. Dadia National...

Constantinos Petrinos / Young volunteer with male Griffon vulture (Gyps fulvus fulvus) during release. This bird shot and subsequently treated at the Aegean Wildlife Hospital, and released by WWF Greece. Dadia National Fore...

Constantinos Petrinos / Young volunteer and woman with male Griffon vulture (Gyps fulvus fulvus) during release. This bird shot and subsequently treated at the Aegean Wildlife Hospital, and released by WWF Greece. Dadia Nat...

Constantinos Petrinos / Mykonos town with white houses, Mykonos Island, Cyclades, Aegean Sea, Greece, August 2007.

Constantinos Petrinos / Windsurfer at Korfos Bay, Mykonos Island, Cyclades, Aegean Sea, Mediterranean, Greece, August 2007

Constantinos Petrinos / Small fruit and vegetable open air market, Mykonos Island, Cyclades, Aegean Sea, Greece, August 2007