Directions for the block and a quilt made from it are in the book "More Quilts from The Quiltmaker's Gift".
http://www.amazon.com/More-Quilts-Qu.../dp/0439519519
There are 19 quilt patterns in the book if I counted correctly. It's early or late I guess for me since I just got in from working a 12 hour shift. The price at Amazon is excellent mine cost $26.99
I like both this book and the first one "Quilts from The Quiltmaker's Gift". The instructions are generally easy to follow. I have never tried the Fish block though. Yours is great!