Here is my Scallop drawing... It's not perfect but I got to start on it as originally just a scallop and then added the details, and I actually think it was a good try!

I used pen and gear 07 mechanical pencil, black Pilot G-2 Gel Roller Pen, Silver Sharpie, Black Vis-a-vis, and Blue, teal, purple, greenish-blue, and tan brush marker/pen...

-Fleck!