I think it was all Tunisian simple stitch...or knit stitch. I'm not clear on the names, and as there is often more than one name for a stitch the confusion grows. Anyhow, it's the one that's basically a single crochet worked in two steps.
Granddaughter was watching me play with changing colors and making a diamond; she was the one who said it would make a fish. Now I know about anchoring stitches when using different colors in knitting, I think there may be a way to do it in Tunisian also. As I recall, I had some really long strands across the back.
Is the Knitting Daily show online and if so do you have a link?