Once I got the larger blocks done, some containing several fish in the oddly shaped center pieces, I had to fill in the blanks with smaller blocks. That's when I had to start plotting the rest of it, since it was put together in no set pattern.
As for the side borders, I used several different blue fabrics. I wanted to provide the feel of being under water, so I used a blue underwater rock print for the bottom and lower side borders, a blue with water coral (is that what I mean?) up the sides, and then, at the top, dark fabrics that look like waves underwater.
I remember working on this project during the divorce when I went away, thanks to my bosses at the quilt shop, for a weekend at a hotel down the beach from where I lived. (A change of surroundings is always good!) I don't know if the hotel staff had ever seen anyone move into a hotel room with a sewing machine and rotary cutting supplies, but they had after that!