Nigel Mott fishes for wild salmon on the Severn using a centuries old method of cages or "putchers".
The salmon swim with the tide and into the traps. But to get them he has to clamber out along a precarious girder and then find his way among the racks of putchers.
His are made of metal, more traditional ones were made from willow.
Mr Mott is wearing a head camera for some of the shots so you can see what he can see.
If what he is doing looks dangerous now, imagine what it is like in the dark, and in a gale. But it is a way of life Mr Mott says he is determined to protect.
The charity took more than 1,600 calls about neglected, abandoned and stray exotic animals in the West Country last year.
Alex Beresford reports in 'Knife Crime & Me', on ITV tonight at 7:30pm.