In the past, seasonal cycles determined the presence or absence of specific fish species. This is not the case nowadays; buying most kinds of fish, crustaceans and molluscs at any time of year has become a well-established habit. This availability is possible thanks to modern preservation techniques that make it possible to transport perishable foods to markets worldwide.
In actual fact, each species of fish is typical in a specific period of the year, and in that particular season its characteristics are at their best, including the intrinsic nutritional qualities. Knowing the best moment to buy and consume the different species of fish, molluscs and crustaceans is advantageous for fishers because this way they capitalise on their catches all year round, and for the consumer who is guaranteed fresh products that come from the nearest sea.