Incidental 30 is an anchovy background character. His model sheet is a redraw of the blue anchovy design from "Help Wanted." Unlike the Help Wanted anchovies, Incidental 30 is solid light blue, rather than darker blue with a light blue front.
Incidental 30's exact model first appears in "Ripped Pants" and has since been seen in various episodes.
Incidental 30 is a basic light blue anchovy who wears a beige shirt.