This research was firstly performed to evaluate the presence of molecules that could have antioxidant power and therefore a possible cosmetic, nutraceutical and biotechnological application of the marine crustacean Aristeus antennatus, a species rich in carotenoids. Then, we applied this model to the analysis of Salamandrina perspicillata skin, because this species is characterized by a high amount of bright red-orange colouration on the legs and tail skin.