The dark green fish is a fish who first appears in the episode "Valentine's Day."
He is a tall, dark green fish with a light green section below his mouth. He has pink lips, light green fins, and a wavy dorsal fin. His eyes are round and white with bags below them. He wears a lavender shirt and darker purple shorts.
Role in series
He is a visitor of the Valentine's Day Carnival. He can be seen walking while holding hands with the green beanie hat kid, indicating he might be his son.
He is driving his boatmobile when SpongeBob jumps onto the windshield and desperately asks if he is ugly. The stench from his mouth stings the fish's eyes, causing him to yell "My eyes! My eyes!" while he swerves and spins around. His boat explodes with him inside, leaving just the charred frame and wheels. A police officer gives his boat a ticket anyway.
He is seen in the crowd when Incidental 104 asks everyone to think of the children. He is behind Incidental 40. Unlike his other appearances, he is missing the light green section on his front and appears to be completely dark green.
He visits Jellyfish Fields to have a picnic with his wife and children. He is playing catch with a beach ball when Neptune's moon appears, turning him and his family into feral fish. In his feral form, he ravenously fights with his family for the ball.