Kelp monster (Scooby-Doo, Where the Crew?)
Kelp Monster
Vital Statistics
Species Sea creature
Gender Male
Other Statistics
Identity Mr. McFinn
Reason To steal sunken treasure
Affiliation Ghost of Captain Pescado
Octopus Monster
Production Details
First appearance TSDS: Scooby-Doo, Where's the Crew?
Played by Frank Welker

The Kelp Monster was the disguise of Mr. McFinn.

Physical appearance

The Kelp Monster is a big glowing green seaweed creature with eye holes, a mouth hole, legs, and arms.


The Kelp Monster was very cruel when helping the Ghost of Captain Pescado and the Octopus Monster trapping Velma Dinkley, Fred Jones, and Daphne Blake.


The Scooby-Doo Show

Season one


McFinn unmasked.

The Kelp Monster attacked the gang alongside the Ghost of Captain Pescado and the Octopus Monster. He was sleeping in the control center, until the Octopus Monster chased Shaggy Rogers and Scooby-Doo and the Kelp Monster woke up and chased Velma Dinkley. The Kelp Monster and his pals found Scooby, Shaggy, and Velma in a sunken ship. The three ghosts were captured. Pescado was First Mate Carp, Kelp Monster was McFinn, and the Octopus Monster was Mr. McGil. The three criminals were taken to jail.