“…Harish Prashanth & Tharanathan (2007) noted that chitin shows promise in a wide range of application, such as food and nutrition (food preservation and antioxidants), medical science (drugs and pharmaceuticals), microbiological (antibacterial), immunological (gene therapeutics and immune potentiator), and material science (packaging films and polymeric membranes). Chitosan is also broadly used in many sectors, mainly in food packaging, environmental protection, pharmaceutical, cosmetics, medicine, dentistry, textile, agriculture, veterinary, chemistry, and biotechnology (Kucukgulmez et al 2016;Tekelioglu et al 2017;Mirtajaddini et al 2021;Farivar et al 2022;Kadak et al 2023). Moreover, carotenoids and carotenoproteins are responsible for most of the colour found in the exoskeletons and shells of crayfish and other crustaceans (Schuster 2020).…”