Billy is a half midget lime green parrotfish and a main citizen of Bikini Bottom with red lips and a golden shirt with a red stripe on it. He was Shubie's son but he was adopted by Evelyn. He makes more cameo or brief appearances than roles in each episodes.
Billy wears a golden t-shirt with a red stripe on it.
"He burnt my shake."
"Mom look, someone left a toy tractor over here."
"Hey Everyone!! Krabby Patties!!" (along with other fish)
"Wow, all of this supporting is making me hungry."
"Hooray!" (along with female fish in bus)