David, you can't call a fish Brian, Brian is a snail. I know, I was there as a student. Late '60s in the JCR at 5.55. More popular than Top of the Pops. For the mystified, do a Google search on "Magic Roundabout Brian Snail".
My first fish, a clear uncoloured Walsh crackle fish, was a Fish called Wanda. For the mystified, do a Google search on "Fish called Wanda". Very English humour, roll around the floor in hysterics standard, not quite as good as "Clockwise", neither of which are intelligible to more civilised societies. Subsequent Walsh and Nazeing (read the paragraph above the Davidson catalogue image, David) fish have been named after ("for" in the USA) the children of my family and friends.
I hope that is all intellegible to everyone! It took me nearly three weeks to get it so concise!
David, before anything else, are the indented swags on the body mould-blown or tooled? If they are regular and gently fade away towards the tail they will be mould-blown.