Figure 1

Macroscopic anatomy of the zebrafish olfactory organ. The olfactory rosette occupies in the head an anterodorsal position. The nostrils lie slightly rostral to the eyes and close to the mouth. Five neurosensorial olfactory cell types (OSNs) have been described: microvillous (mv); ciliated (cl); crypt (cr); kappe (kp); and pear (pr) OSNs. Drawing by Helena Reino Piñeiro published under a CC BY open access license.