Sea- Trout e277 
salmon-trout, and many other names. In the grilse stage it is known 
as herling, whitling, Finnock, Lammasmen, etc.; while in the smolt 
stage it is called yellow-fin, orange-fin, black-fin, silver-white, and 
many other names. In fact, almost every district has a different 

Fic. 122.—Salmon, showing number of scales from adipose fin to lateral line to be ten. 
name for each of the three stages. While much confusion is thus 
caused, it would be a very simple matter to call them sea-trout, in the 
grilse stage whitling, and in the smolt stage yellow-fin (Fig. 124). 
The history of the sea-trout differs widely from that of the salmon ; 
but I shall explain this later. It is often difficult to tell a parr of the 
yellow-fin before its fin becomes yellow, although those who have 
