The Brickleback

 is a ferocious green sea monster on The Sea Beast.

Throughout The Sea Beast
The Brickleback is the first sea monster to appear in the movie. It attacked The Inevitable.

Physical appearance
The Brickleback is a large, green and arthropod-like sea monster with tentacles and large jaws. It also has a crocodile-like snout.

Appearances

 * The Sea Beast

Trivia

 * Character designer Shiyoon Kim said he was inspired by crocodiles and other animals with tentacles, such as octopuses. He also incorporated the shell of a crocodile.
 * According to production designer Matthias Lechner, director Chris Williams was very insistent that we cannot connect emotionally to the Brickleback.