I also attended the Bristol festival of stone as an exhibitor, carving a very big salmon. I carved a prototype to see if it would work before attempting the larger sculpture out of a block of Portland.
Bath stone mini fish..
The larger fish is still a work in progress, which I am hoping to complete over the winter as the work is tailing off, hopefully next to a heat source of some sort. This is my most recent picture of it.
And below the still, *sigh* unfinished fish in progress stop motion film, this film is about 3 weeks worth of work.