ReviewPublished 15 April 2026Circular valorisation of fish processing by-products: integrated protease recovery and functional protein hydrolysate productionWan Yusmanira Enche Khawari · Nordiana Othman · Muhammad Harith Danial Fabil · Nur Yuhasliza Abd Rashid · Fadzlie Wong Faizal WongFrontiers in Aquaculturedoi 10.3389/faquc.2026.1796470