The sea monster is a minor character in The Backyardigans.
The monster is a mythical marine beast who likes to swim in the Splashinis' pool. The creature makes a unique burbling sound and often performs water tricks. He is part of Uniqua, Pablo, and Tyrone's synchronized swimming act.
The sea monster is green with dark green spots along his back and sides. He has two white eyes, a pink tongue, and two dark green eyebrows. He has a sail and many dorsal fins.
The sea monster has appeared in one episode of The Backyardigans: "The Amazing Splashinis" from season four.