Sea lrout 151 
At one time the Coquet was a splendid salmon and grilse river, 
but now holds very few. This is not to be wondered at, as the 
passage over so many high weirs prevents salmon reaching the 
higher parts of the river to spawn. A sea-trout will surmount weirs 
and go through difficult fish-passes where a salmon would fail. I am 
at present designing fish-passes for these weirs to allow salmon to pass 
up, and I hope to see the time when salmon will again be plentiful 
in this river. 
I have compared these so-called bull-trout with the sea-trout of 
the Tay, which are never called bull-trout, and | can find no difference 
except that the large ones in the Tay are better fed. They have all 
the same number of scales—fourteen from the adipose fin to the lateral 
line. Many of them are supposed to be crosses between a salmon and 
a sea-trout, which no doubt some of them are. I give the photograph of 
one which the fishermen of the Coquet thought to be a cross (Fig. 139). 
What the result of the after-cross would be I leave others to judge. 
These sea-trout are distributed over the whole of Great Britain, but 
are more plentiful in the Coquet and in the Tweed than in any other 
river I know of. As anglers are the people who are chiefly concerned 
with the life-history of the Salmonidz, there ought to be some simple 
way for their determining what salmon, sea-trout, and trout are, 
without having to wade through books and become more confused 
than ever. Salmo salar should be called fry, parr, smolt, salmon; 
foul salmon in the spawning season, and kelt salmon after spawning. 
Salmo ertox should be called fry, parr, yellow-tin, sea-trout ; and if a 
further distinction is wished, grilse could be called young salmon, 
and whitling young sea-trout. 
In small rivers, such as the Dovey in North Wales, where salmon 
have been over-netted and poached, they have decreased while the sea- 
trout have increased, showing that sea-trout are more difficult to 
exterminate than salmon. When on this river not long ago I found 
that the belief amongst fishermen there is, that the sea-trout—Salzo 
eviox—is different from the bull-trout; but besides sea-trout and bull- 
trout they have another which they call brith dail, because it is 
