Afnan, M.A., Sutarjo, G.A. and Hariyadi, H. 2020. Analysis of fresh water ornamental fish production (Goldfish, Koi and Betta Fish) in Tulungagung district, East Java, Indonesia. IJOTA (Indonesian Journal of Tropical Aquatic). 2, 2 (Sep. 2020), 80–87. DOI:https://doi.org/10.22219/ijota.v2i2.10033.