I love sharpies and I love lines so this is a perfect activity . I forgot where I found this idea. I began the lesson by asking these grade 1 and 2 students to draw a backwards c for the mouth from there we drew the body, added a tail and fins. then inside the fish...they drew lines and shapes and made patterns.
I didn't have them colour them...however, if I wanted to extend the project, colour can be added and maybe some rhinestones and pass it off as the Rainbow Fish!