When the member of my bookbinding group cover books with fish leather, we do it a bit differently from when we use morocco. In partial leather bindings the leather is usually put on the boards before the paper, and the paper overlaps the leather a little when glued down onto the boards. This method can be used with fish leather, but we all like the naturally irregular and scalloped edges of fish leather, so we often begin with the paper and apply the fish leather over it, to preserve the natural look of the leather edges. These are often quarter bindings, i.e. only the spine and small part of the sides are covered with the leather and the rest is all paper, including the corners. This is what I am doing with these books. They are not going to be read or even handled much, and so I don’t think they will need leather corners. Here are the first two that I have finished:
The leather in both cases is spotted wolf-fish, and the paper is scrapbook paper. Each book will have a different coloured spine and paper covering.