12 BRITISH SPORTING FISHES. 
and is particularly fond of small crustaceze, sand- 
hoppers, and other marine creatures. As it ap- 
proaches the estuaries of rivers, its food becomes 
more general, and when it enters them, the 
winged water-flies constitute almost its sole diet. 
Another member of the Salmonide is the 
bull-trout, said to be a species by some, by 
others only a variety. It is found in many rivers 
common to salmon and sea-trout, and is fairly 
abundant in most British salmon rivers. Its 
specific distinctions vary greatly with local con- 
ditions, so much so, sometimes, as almost to 
make it past recognition. Grey-trout is one of 
its provincial names, round-tail another, and on 
the north-east coast it is known as the scurf. So 
much does the bull-trout resemble the true salmon 
in appearance, that, after the tail has been clipped 
square, it is sold as such, This resemblance 
between the two species extends to haunt and 
habit, food, spawning, and migration. The bull- 
trout attains to a considerable weight ; and just as 
the fish is in good condition or otherwise, so its 
flesh is pink or yellowish white. As a game-fish, 
it affords capital sport, and fights as vigorously 
as the salmon or brown-trout. 
