Representative examples of the fin excision coding scheme used to uniquely identify UPV SpiN tilapia hybrid (Oreochromis spilurus × O. niloticus) samples. (A) The first six dorsal spines were assigned numbers 1–6, respectively; excision of selected spines generates a unique identifier for each sample. (B) Sample #1; Code: _23456 (spine 1 excised). (C) Sample #13; Code: 1_3_56 (spines 2 and 4 excised). (D) Sample #38; Code: 12_ _ _6 (spines 3–5 excised). Selective removal of the first six dorsal spines produces up to 63 unique codes, with missing numbers indicating excised spines.

 
 
  Part of: Dinaga CJP, Genciana ABN, Failaman AA, Fontanilla MAG, Estrada RA, Mameloco EJG, Ferriols VMEN, Traifalgar RFM, Lumayno SDP (2025) Feminization of a saline-tolerant tilapia hybrid, UPV SpiN (Oreochromis spilurus × O. niloticus) (Actinopterygii, Cichliformes, Cichlidae) using 17β-Estradiol: Effects of dose and administration method. Acta Ichthyologica et Piscatoria 55: 227-235. https://doi.org/10.3897/aiep.55.161420