Workers search under ultraviolet light for remaining bits of shell in blue crab meat before they pack the meat for export at the coastal town of San Francisco, Lake Maracaibo July 22, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY IMAGES OF THE DAY)

An employee holds up a can of blue crab meat for export at the coastal town of San Francisco, Lake Maracaibo July 22, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

Fishermen are seen around their catch of blue crabs at Maracaibo's lake costal town of Barranquitas July 21, 2011. Blue crabs caught on the edge of Lake Maracaibo will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption due to greasy oil stains covering their shells. Hence fishermen often sell the crabs to local middlemen who then send the product to one of the 19 processing plants in the area, where hundreds of staff are hired to separate the meat before it makes its way to the dining tables of U.S. restaurants. Picture taken July 21, 2011. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ANIMALS BUSINESS FOOD SOCIETY)

Workers pack blue crab meat for export at the coastal town of San Francisco, Lake Maracaibo July 22, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

A blue crab sits in a basin after being caught at the coastal town of Barranquitas, Lake Maracaibo July 21, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

A fisherman catches blue crabs at the coastal town of Barranquitas, Lake Maracaibo July 21, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

Workers pack blue crab meat for export at the coastal town of San Francisco, Lake Maracaibo July 22, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

Government officials from the National Institute of Agricultural Investigation (INIA) measure the size of a blue crab at the coastal town of Barranquitas, Lake Maracaibo July 21, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

Workers pack blue crab meat for export at the coastal town of San Francisco, Lake Maracaibo July 22, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

Fishermen haul up their catch of blue crabs at the coastal town of Barranquitas, Lake Maracaibo July 21, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

Workers pack blue crab meat for export at the coastal town of San Francisco, Lake Maracaibo July 22, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT FOOD BUSINESS SOCIETY)

Government officials from the National Institute of Agricultural Investigation (INIA) measure the size of a blue crab at the coastal town of Barranquitas, Lake Maracaibo July 21, 2011. Venezuelan fishermen inspect their catch of blue crabs on the edge of Lake Maracaibo, concerned about the greasy oil stains covering their shells, where they will be processed and shipped to seafood restaurants in Maryland and New York where they are considered a delicacy. But scientists and fishermen in the state of Zulia in northwestern Venezuela worry that the crabs may not be safe for consumption. Pollution in Lake Maracaibo has been a problem for decades. In recent weeks the area has been blighted by several leaks from tangled pipes, corroding pumps and other oil installations that crisscross the lake. To match Reuters Life! VENEZUELA-CRABS/ REUTERS/Isaac Urrutia (VENEZUELA - Tags: ENVIRONMENT BUSINESS FOOD SOCIETY)