Northern straight-mouth nase, Pseudochondrostoma duriense, head detail. Spawning male with characteristic nuptial tubercles on head.

- Image ID: J7Y06P
Northern straight-mouth nase, Pseudochondrostoma duriense, head detail. Spawning male with characteristic nuptial tubercles on head.
Paulo Oliveira / Alamy Stock Photo
Image ID: J7Y06P
Northern straight-mouth nase, Pseudochondrostoma duriense, head detail. Spawning male with characteristic nuptial tubercles on head. Portugal