Coach is Patrick's former physical education teacher.
The coach is a muscular fish with a white tee-shirt, blue shorts, and a blue hat. He is green and carries a whistle.
He only appeared in the episode "Sing a Song of Patrick," during Patrick's flashback. He randomly appeared while Patrick was reciting his poem and the coach angrily claimed that it was gym class before Patrick was pelted with dodge balls.
"We paid ten dollars for this?"
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