These are the total copies of ribosomal RNAs (5S, 5.8S, 18S, and 28S rRNA) and their chromosomal locations in the Yellowfin tuna (Thunnus albacares) genome. And this dada as a supplementary part of this following Manuscript: Molecular approach to unbiased staging of ovarian development in tuna (Thunnus albacares) fish Joyanta Bir*1,3, Oihane Diaz de Cerio1, Maren Ortiz-Zarragoitia1, Patricia Lastra Luque2, Deniz Kukul2, Iker Zudaire2, and Ibon Cancio1 1CBET Research Group, Dept. of Zoology & Animal Cell Biology, Centre for Experimental Marine Biology & Biotechnology (PiE-UPV/EHU), University of the Basque Country (UPV/EHU), Areatza 47, 48620, Plentzia, Spain 2AZTI Marine Research, Basque Research and Technology Alliance (BRTA), Herrera Kaia Portualdea z/g, 20110 Pasaia, Spain 3Fisheries and Marine Resources Technology Discipline, School of Life Sciences, Khulna University, Khulna, 9208, Bangladesh