One of the world’s biggest salmonids, the Danube salmon is now amongst the most endangered fish species in Europe. This sizeable freshwater fish has an elongate, almost cylindrical body, a large head and mouth, and strong conical teeth. The back is a grey-brown to red-brown colour and patterned with numerous dark spots, the sides are reddish-grey with a copper-coloured gloss, and the belly is silvery-white.