Sea

A long-distance swimmer dives into the Atlantic Ocean at dawn, Friday, July 24, 2015, in Falmouth, Maine. The woman is part of a group that regularly starts their day with a 2-mile swim. Many of the swimmers keep a float tethered to their bodies for safety

Robert F. Bukaty/AP

A long-distance swimmer dives into the Atlantic Ocean at dawn on Friday, in Falmouth, Maine. The woman is part of a group that regularly starts their day with a 2-mile swim

Divers swim above toilets from a wreck near the Yolanda Reef at Ras Mohammad, close to Sharm El Sheikh, Egypt, 23 July 2015. The famous dive site of the Ras Mohammed National Park contains the remains of the 'Yolanda' wreck, which sank in the 1970s, leaving toilets and bath tubs on the sea bed.

Sergey Dolzhenko/EPA

Divers swim above toilets from a wreck near the Yolanda Reef at Ras Mohammad, close to Sharm El Sheikh, Egypt on thursday. The famous dive site of the Ras Mohammed National Park contains the remains of the ‘Yolanda’ wreck, which sank in the 1970s, leaving toilets and bath tubs on the sea bed

People sunbathe at Levante Beach on Wednesday in Benidorm, Spain

David Ramos/Getty Images

People sunbathe at Levante Beach on Wednesday in Benidorm, Spain

Fisherman cast their lines off a jetty in the early morning hours as dark clouds loom over the Atlantic Ocean, Tuesday, July 21, 2015, in Bal Harbour, Fla.

Wilfredo Lee/AP

Fisherman cast their lines off a jetty in the early morning hours as dark clouds loom over the Atlantic Ocean on Tuesday, in Bal Harbour, Florida

A man floating in the waters filled with algae at a beach in Qingdao, in eastern China's Shandong province. The algal phenomenon, an annual occurrence in Qingdao, is usually caused by an abundance of nutrients in the water, especially phosphorus, although the triggers for the enormous blooms which began to appear in the Yellow Sea in 2007 remain uncertain

AFP

A man floats in the waters filled with algae at a beach in Qingdao, in eastern China’s Shandong province. The algal phenomenon, an annual occurrence in Qingdao, is usually caused by an abundance of nutrients in the water, especially phosphorus

An Indian boy walks by the Arabian Sea coast piled with garbage, mostly plastic waste, in Mumbai, India, Friday, June 26, 2015. Several recent reports have highlighted India s worsening air quality and termed its capital New Delhi the worst polluted city in the country. In the last decade, along with India's economic boom and increasing prosperity, the output of garbage has also increased manifold

Rajanish Kakade/AP

An Indian boy walks by the Arabian Sea coast piled with garbage, mostly plastic waste, in Mumbai, India on Frida

A freighter lies off the coast at sunrise in Algiers, Algeria June 25, 2015.

Ramzi Boudina/Reuters

A freighter lies off the coast at sunrise in Algiers, Algeria on Thursday

Migrants sit on the deck of the Belgian Navy vessel Godetia after they were saved at sea during a search and rescue mission in the Mediterranean Sea off the Libyan coasts, Wednesday, June 24, 2015. Hundreds of migrants were rescued on Tuesday by the Godetia, which is part of a EU Navy vessels fleet taking part in the Triton migrants rescue operation

Gregorio Borgia/AP

Migrants sit on the deck of the Belgian navy vessel Godetia after they were saved at sea during a search and rescue mission off the Libyan coast

Visitors react on the rock as a man jumps into the water, above Cleopatra's Beach, on a summer s day before the start of the holy month of Ramadan, which begins on June 18, at the Mediterranean city of Marsa Matrouh...Visitors react on the rock as a man jumps into the water, above Cleopatra's Beach, on a summer s day before the start of the holy month of Ramadan, which begins on June 18, at the Mediterranean city of Marsa Matrouh, northwest of Cairo, Egypt.

Amr Abdallah Dalsh/Reuters

Visitors react on the rock as a man jumps into the water, above Cleopatra’s Beach, on a summer s day before the start of the holy month of Ramadan at the Mediterranean city of Marsa Matrouh, northwest of Cairo, Egypt

Great Britain's Nick Dempsey comes home to win the first race of the day during the Men's RS:X windsurfing on day five of the ISAF Sailing World Cup at Weymouth. PRESS ASSOCIATION Photo. Picture date Wednesday June 12, 2015.

Andrew Matthews/PA

Great Britain’s Nick Dempsey comes home to win the first race of the day during the Men’s RSX windsurfing on day five of the ISAF Sailing World Cup at Weymouth on Friday

Contestants jump into the water pit during the women's 3000m steeplechase finals at the Southeast Asian (SEA) Games in Singapore June 12, 2015.

Edgar Su

Contestants jump into the water pit during the women’s 3000m steeplechase finals at the Southeast Asian (SEA) Games in Singapore on Friday

A migrant, who was found at sea on a boa...A migrant, who was found at sea on a boat, arrive at a temporary shelter near the Kanyin Chaung jetty to MeeThike sub-township outside Maungdaw township, northern Rakhine state on June 4, 2015.  More than 700 migrants found adrift on a fishing boat six days ago disembarked in Myanmar's western state of Rakhine as the US warned it was monitoring their fate "very closely".    AFP PHOTO / YE AUNG THUYe Aung Thu/AFP/Getty Images

Ye Aung Thu/AFP/Getty

A migrant, who was found at sea on a boat, arrives at a temporary shelter near Maungdaw township, northern Rakhine state, Myanmar

Malaysia v Vietnam - Men's Singles - Vietnam's Tran Tuan Quynh in action

Singapore SEA Games Organising Committee/Action Images/Reuters

Vietnam’s Tran Tuan Quynh in action during the Malaysia v Vietnam Men’s Singles match in Singapore

An aerial view taken from a sea plane shows Swiss pilot and original Jetman Yves Rossy and Vince Reffett flying over Dubai's Palm Island...An aerial view taken from a sea plane shows Swiss pilot and original Jetman Yves Rossy (front) and Vince Reffett flying over Dubai's Palm Island, Dubai, United Arab Emirates May 12, 2015

Lara Sukhtian/Reuters

Swiss pilot and original Jetman Yves Rossy and Vince Reffett flying over Dubai’s Palm Island, Dubai, United Arab Emirates on Tuesday

The sun rises off the North East coast near Cullercoats bay in North Tyneside, as Britain is set to bask in its hottest temperatures of the year so far, with the mercury expected to soar higher than in parts of Spain this week.

Owen Humphreys/PA

The sun rises off the northeast coast near Cullercoats Bay in North Tyneside, as Britain is set to bask in its hottest temperatures of the year.

Cornwall Set To Be A Crucial Election Battleground...ST JUST, UNITED KINGDOM - APRIL 07:  The sun sets over mist that has formed on the sea from Cape Cornwall near St Just on April 7, 2015 in Cornwall, England. Prime Minister David Cameron has said that the six seats in the county of Cornwall are essential to achieve a Conservative majority when Britain goes to the polls on May 7.  (Photo by Matt Cardy/Getty Images)

Matt Cardy/Getty

The sun sets over mist that has formed on the sea from Cape Cornwall near St Just in Cornwall, England. Prime Minister David Cameron has said that the six seats in the county of Cornwall are essential to achieve a Conservative majority when Britain goes to the polls on May 7. 

The moon sets in the early morning hours as a man walks along an ocean pier in Oceanside, California on Thursday

Mike Blake/Reuters

The moon sets in the early morning hours as a man walks along an ocean pier in Oceanside, California on Thursday

Dead fish are pictured on the banks of the Guanabara Bay in Rio de Janeiro February 24, 2015.  International Olympic Committee members meeting in Rio de Janeiro this week will understand if its waters are not completely clean for the sailing events in 2016, the state's governor said on Monday.

Ricardo Moraes/Reuters

Dead fish on the banks of the Guanabara Bay in Rio de Janeiro on Tuesday. International Olympic Committee members meeting in Rio de Janeiro this week will understand if its waters are not completely clean for the sailing events in 2016

Israeli surfers

AP Photo/Oded Balilty

Israeli surfers walk out of the water after competing in a night surfing competition in the Mediterranean sea in Ashdod, southern Israel. About 40 surfers took part in the competition which started Wednesday after sundown.

Men jump into the waters of a lake in an attempt to grab a wooden cross on Epiphany Day in Sofia...Men jump into the waters of a lake in an attempt to grab a wooden cross on Epiphany Day in Sofia January 6, 2015. Orthodox priests throughout the country bless the waters by throwing a cross into it as worshippers try to retrieve it. It is strongly believed that catching the cross brings health and prosperity to the person who captures it.    REUTERS/Stoyan Nenov (BULGARIA  - Tags: SOCIETY RELIGION TPX IMAGES OF THE DAY)

Stoyan Nenov/Reuters

Men jump into the waters of a lake in an attempt to grab a wooden cross on Epiphany Day in Sofia. Orthodox priests throughout the country bless the waters by throwing a cross into it as worshipers try to retrieve it. It is strongly believed that catching the cross brings health and prosperity to the person who captures it.