Most farmed marine fish are carnivorous species such as Atlantic salmon Salmo salar, gilthead seabream Sparus aurata, European sea bass Dicentrarchus labrax and Japanese amberjack Seriola quinqueradiata, among others, that require marine ingredients in their feed in order to achieve an optimal growth rate and health status.However, there are many reasons why the aquaculture industry has been researching alternatives to fishmeal (FM) and fish oil (FO), since these products are both increasingly difficult to obtain and their costs have increased considerably.One of the main reasons is the status of traditional fisheries.Captures of wild fish have remained stable since the 1980s despite technical improvements, indicating that fish stocks are being exploited at their maximum levels (FAO 2009).Although improvements to feed-grade fisheries exploitation have been made (Welch et al. 2010), it appears that such fisheries still need to realise important progress in terms of correct labelling -regarding
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Fernandez‐Jover et al. (2011) studied this question.