Sebastian is a red Trinidadian crab and one of the three tritagonists in Disney's 1989 hit film The Little Mermaid, its prequel film, its TV series, and its sequel. He is usually voiced by Samuel E. Wright until the Kingdom Hearts series and Disney Parks. Sebastian also appears in the Kingdom Hearts series of games, who can help Sora, Donald Duck and Goofy to defeat Ursula.
The Little Mermaid: Ariel's Beginning
Sebastian is the heir of King Triton. He and King Triton keep an eye out to ban any musician from Atlantica. Though he agrees with King Triton, Sebastian usually is seen playing music in the Catfish Club Band. He and the band members are arrested by the king's guards in jail. Being arrested, he and the band members start a prison riot and escape to bring music back to Atlantica. He and Ariel's friends stand up against Marina Del Rey and the music of Athena's song has brought her back to life. Sebastian later listens to King Triton's misunderstanding and becomes the royal court composer.
The Little Mermaid
After the prequel, Sebastian is presented along with his assistant King Triton. He is forced to keep a watch on Ariel. Sebastian has heard about Ariel falling in love with Prince Eric. Later, he convinces Ariel that the human world is too dangerous for her, so it is better to go under the sea. After King Triton destroys Ariel's treasures, Sebastian plays another signature song about Eric and Ariel falling in love as humans. He dislikes marine animals which are cooked, so he avoids Chef Louis. During the wedding, Sebastian and the other animals disrupt the wedding of Vanessa and Eric. Sebastian is later seen during the wedding of Prince Eric and Ariel.
The Little Mermaid II: Return to the Sea