Coach

The coach is 's former physical education teacher and appears in a flashback scene in the episode "Sing a Song of Patrick."

Description
The coach is a muscular male fish with a white shirt, blue shorts, and a blue hat. He has light olive green scales with a light orange dorsal fin and carries a silver whistle.

Role in episode
He first appears during Patrick's flashback while young Patrick is reciting his poem and the coach angrily claims that it was gym class before Patrick is pelted with dodge balls.

He later appears at the end of the episode and claims that Patrick needs another lesson. He, along with a crowd, get their dodge balls ready and start pelting Patrick with the balls.