Fish grades identification system with ensemble-based key feature learning Fityanul Akhyar, Ledya Novamizanti, Inung Wijayanto, Cahaya Irham Wirawan, Dede Chandra Wijaya, Agno Fredigo, Ferdi Ramdhon and Chih-Yang Lin ITM Web Conf., 67 (2024) 01034 Published online: 21 August 2024 DOI: 10.1051/itmconf/20246701034