One can literally stand on the beach and buy fish from the fishermen as they come in with their small boats.
I do believe that Spain is the largest fish consumer nation in the world after Japan, which means that any fish on sale in the shops is really as fresh as you can get.
Oily fish are a great source of essential fatty acids, omega-3 fatty acids. The body can't produce them, so you need to have a dietary source. They help reduce the risk of heart disease, blood clotting and arthritis, as well as being good for overall health and disease prevention.
Unfortunately, these days, fish become contaminated with mercury due to environmental pollution by industrial processes. The mercury enters the water and is then absorbed at low levels by small fish. High levels of methylmercury can build up in large predatory fish, such as sharks, because they eat large numbers of the smaller fish.
So the question becomes: How much oily fish is good for you? Helen Parker, editor of Which? said: "┬ůWhat we advise is that, as part of a balanced and varied diet, people should eat at least two portions of fish a week, one of which should be oily".
Experts say that, with most types of fish, these risks are small and are outweighed by the benefits of eating oily fish. If you're pregnant, trying for a baby, or are feeding infants and young children, avoid consuming shark, swordfish and marlin as these are known to contain the highest levels of mercury.
If people do follow this recommendation their intake of dioxins and other contaminants should not be at a level to confer a health risk."
One of the fish you see a lot of on the Costa is the "Dorada" (gilthead bream). The Spanish have a most simple and satisfying method of cooking this fish and make it retain all the juiciness and taste of the sea.