| Unofficial name
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The unnamed son is a character who appears in the episode "A Day Without Tears."
He is a light yellow fish with black eyes and light blue limbs and lips. He is shown with a blue cap, brown baseball gloves, and blue and pink pants which are similar to Patrick's.
Role in episode
He is seen on TV asking his father if they could play a game of catch. His father refuses at first but they eventually played for a couple throws.