This can give a clear market advantage as supermarkets and producers of processed fish are keen to offer their customers the assurance that their products are not damaging the environment.

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The FSA surveyed 336 fresh, frozen and processed sea fish and shellfish for mercury content, including trout, salmon, tuna, halibut, hoki, sea bass, lobster, mussels and prawns.

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Moreover, about 80% of the fish processed is imported from countries such as Russia, which implies that the processors would just have to slim down a bit rather than close if the Scottish fleet is forced to tie up.

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But the company has discovered that its algae can be processed into other useful things: feed for fish farms, protein powders for food supplements and omega-3 fatty acids used in a variety of supplements and pharma products.

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The Mediterranean diet began to gain heart health advocates, with its high content of olive oil, fruits, nuts, vegetables, cereals, moderate amount of fish and poultry, and low intake of dairy products, red meat, processed meats and sweets.

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This means avoid processed food, and keep to a natural diet, like fresh fruit, vegetables, nuts, fish.

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