“…The use of marine wastes including by-products of industrial plants, such as fish skin, scales and fins, as a source of fish collagen helps to fight environmental pollution and serves as a strategy to valorize marine resources [254,279]. Intriguingly, it is possible to isolate fish collagen from skin of marine Eel fish [280], codfish [281][282][283], European hake [284], smooth wolf herring [267], blue shark [285,286], small-spotted catshark [253], salmon [266,283], ocellate puffer fish, seaweed pipefish, brownstripe red snapper, brownbanded bamboo shark, carp, largefin longbarbel catfish, Japanese sea-bass, bigeye snapper, surf smelt, brown backed toadfish, Nile perch, skate, blacktip shark [255,256], bones of European hake [284], carp, Japanese sea-bass, skipjack, ayu, yellow sea bream, horse mackerel, Baltic cod [255], swim bladder of Atlantic cod [287], cartilages of brownbanded bamboo shark, blacktip shark, scales of carp, tilapia, spotted golden goatfish, grey mullet, rohu, and catla [255,256].…”