SIR - Regarding the miller's thumb or bullhead (Cottus Gobio), I was interested in your recent article about this fish.
As a fisheries inspector with the Environment Agency from 1965-1991, I came across this little chap from time to time.
The most likely places to find it were in clean shallow rivers such as Leigh Brook and Hadley Brook. Being a secretive creature, it was never a species that anglers fished for - if caught it would be by accident.
We would see the Bullhead quite often during population surveys, because on this job we used a low voltage that bring them up to the surface, where they would be picked up in a hand net, like an anglers landing net, weighed, measured, then returned to the water unharmed.
CHARLEY LEVETT (BEM),
Worcester.
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