Olfaction and taste are specialized chemical senses in arthropods and vertebrates. In terrestrial species, taste is considered a proximal sense whereas olfaction is considered distal. However, in some fish species, taste buds are also present on the outer body surface. This points to the possibility that in aquatic species taste also has a function in sensing the outer chemical environment. Zebrafish possess 4 T1Rs and 7 T2Rs, which makes a comprehensive analysis of their expression possible. Here we show that there is a taste organ-like high density of T1Rs and T2Rs on the nostrils of zebrafish, Danio rerio. In situ hybridization (TSA) was performed on coronal sections of adult zebrafish head to label all T1R- and T2R-expressing taste cells using complete mixes of individually validated RNA probes. The density of T1R- and T2R-expressing taste cells were measured on the nostrils, lower lip, oral cavity, and top head skin surfaces. Data was analysed using two-tailed unpaired Student’s t-test. The results show the highest density of T1R-expressing taste cells in the nostrils, in stark contrast to the very low density observed in head skin, with intermediate density found in the oral cavity. T2Rs show overall lower densities in all four organs, but with similar ratios between organs. These results suggest that the nostrils of zebrafish should be considered as a novel taste organ and point to a possible link between the detection and processing of gustatory and olfactory signals. This study was funded by DFG within the PhD Program “Research Training Group – Neural Circuit Analysis (RTG-NCA), GRK 1960”.