At first I was thinking I wouldn't be able to make a block like you wanted because I didn't have any fish fabric! Then I re-read your instructions and realized you gave other options and that was just for bonus points. Hee. Hee. So here are the two blocks that I will be sending your way!
And the second one always makes me smile. I have never seen blue eyed critters before and here are a whole bunch of them staring at me. This fabric cracks me up. These blocks were a lot of fun to make and I can't wait to see the finished quilt you make for your dad.