A woman packs fish cans while a costumer leaves the Conserveira of Lisbon shop in downtown Lisbon April 15, 2013. Conserveira of Lisbon is one of the few shops in Lisbon preserved in its original form and fashion and where grandma, mom, son and grandsons work together. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Photo taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

Old fish cans and tools to open them are seen on a shelf at the Conserveira of Lisbon shop in Lisbon April 15, 2013. Shop owner Regina Ferreira says canned fish is one of the oldest and healthiest fast foods in the world. She runs an eighty-three year old family business selling fish cans in downtown Lisbon, one that is recommended by most tourist guide books. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Photo taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

Fish cans are seen at the seaside in Ericeira May 22, 2013. Only about half of the once prosperous fish canning industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor.Photo taken May 22, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

Women work at the Ramirez fish canning factory in Leca da Palmeira, northern Portugal May 17, 2013. Ramirez was created in 1853 and it is one of 20 fish canning factories. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavour. Photo taken May 17, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

Cans filled with cod fish in olive oil and garlic are seen at the Ramirez factory in Leca da Palmeira, northern Portugal, May 17, 2013. Ramirez was created in 1853 and it is one of 20 fish canning factories. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavour. Photo taken May 17, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE BUSINESS) 

Old fish can designs are displayed at the Loja Portugueza shop in Lisbon May 7, 2013. Old fish can designs are displayed together with new ones in groceries and souvenir shops. Tourists buy fish cans as they buy postcards, taking with them not only the image but also a bit of Portuguese flavor. Only about half of the once prosperous fish canning industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Photo taken May 7, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE BUSINESS) 

Regina Ferreira talks with a customer at the Conserveira of Lisbon shop in Lisbon April 15, 2013. Ferreira says fish cans are one of the oldest and healthiest fast foods in the world. She runs an eighty-three year old family business selling fish cans in downtown Lisbon, one that is recommended by most tourist guide books. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Photo taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

An employee dressed in traditional clothes at Loja Portugueza shop shows old fish can designs in Lisbon May 22, 2013. Old fish can designs are displayed together with new ones in groceries and souvenir shops. Tourists buy fish cans as they buy postcards, taking with them not only the image but also a bit of Portuguese flavor. Only about half of the once prosperous fish canning industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Photo taken May 22, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE BUSINESS) 

A waitress walks past a display of canned fish at the Can & Can restaurant in Lisbon April 15, 2013. The Can & Can restaurant, located in Lisbon's Comercio square opened recently serving fish cans as a "gourmet" offering in a modern design atmosphere. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Photo taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

Portuguese fish cans are displayed on a shelf at the Lisbon Restaurant Can & Can in downtown Lisbon April 15, 2013. The Can & Can restaurant, located in Lisbon's Comercio square opened recently serving fish cans as a "gourmet" offering in a modern design atmosphere. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Picture taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

Sardine pins are displayed for sale at the Conserveira of Lisbon shop in Lisbon April 15, 2013. Regina Ferreira says fish cans are one of the oldest and healthiest fast foods in the world. She runs an eighty-three year old family business selling fish cans in downtown Lisbon, one that is recommended by most tourist guide books. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Photo taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

A man walks past a door painted like a fish can in a narrow street in Setubal, near Lisbon, May 27, 2013. The harbor of the fishing city of Setubal has no fish canning factory today. The only remnants of those cans are those painted on the doors of homes in the old downtown area. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Photo taken May 21, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY FOOD AGRICULTURE) 

Fish cans are displayed on a shelf at the Can & Can restaurant in downtown Lisbon April 15, 2013. The Can & Can restaurant, located in Lisbon's Comercio square opened recently serving fish cans as a "gourmet" offering in a modern design atmosphere. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Picture taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY AGRICULTURE FOOD) 

Can & Can restaurant chef prepares canned sardines with eggplant and cherry tomato serve in downtown Lisbon, April 15, 2013. On the Comercio square a new restaurant and bar, Can & Can, opened recently serving fish cans as "gourmet" in a modern design atmosphere. Portugal, canned fish is as popular as burgers in the U.S. or bratwursts in Germany. Only about half of the once prosperous industry has survived over the years, but the remaining industry employs around 3,500 workers and produces more than 250 million fish cans a year, exporting around 70% of their production to some 70 countries worldwide. Tourists in Portugal buy fish cans just like postcards, taking with them not only the image but also a bit of Portuguese flavor. Photo taken April 15, 2013. REUTERS/Jose Manuel Ribeiro (PORTUGAL - Tags: TRAVEL SOCIETY AGRICULTURE FOOD)