The blue kid fish is a kid who first appears in the episode "Krabby Land."
He is a short child fish with cyan skin, three darker blue spots on each side of his forehead, two big roundy beige eyes with blue pupils, three eyelashes on each eye, small nostrils, a lighter belly plate and dark blue stripes on his fins. He wears a red sailor hat and a pair of red short overalls with two small pockets at each side and a bigger one on the front.
In "What Ever Happened to SpongeBob?", he was pale yellow with olive green spots, his lips were pink, his eyes were white, his hat was orange, and he wore a blue buttoned coat with light blue fur. In "Hello Bikini Bottom!", his skin was mustard yellow with orange spots, belly plate and fin stripes, his pupils were black and he didn't have eyelashes, his hat was white, and his overalls were blue.
He appears in Mr. Krabs' imagination running with a pocket full of money when he tells SpongeBob what makes him happy about summer.
In this episode, he lives in New Kelp City and is yellow. He runs away from the bubble along with his mom when SpongeBob blows it when he is at the game store. He's later on the crowd during SpongeBob's speech when he becomes a mayor.