This article is about the character from the DTV short Scooby-Doo! and the Beach Beastie. For other uses, see Sea monster (disambiguation).
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The sea monster was the disguise of Grafton Brownstone.

Physical appearance

Due to its ability to change shape at will, the sea monster's appearance varied, from a frilled humanoid creature to a shark. However, the sea creature's body was still see-through.


It seems interested in the necklace that Grafton's girlfriend is wearing.

Powers and abilities

The sea monster possessed the ability to manipulate water in order to change into various forms of sea creatures, such as a shark, frilled humanoid, snake, and an octopus.


Scooby-Doo! and the Beach Beastie

Grafton Brownstone unmasked.

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