Clamdestine is a 2012-introduced and prose-only character. He is a sea monster and a teacher at Monster High. He hosts Ghoulish Literature with the enthusiasm and creativity of a Dramarama teacher, seeing a story and performance in everything.
A showy man, Dr. Clamdestine likes to surprise his students with out-of-the-ordinary behavior to et them in the mindset to appreciate the literature discussed in his class. He does not believe in keeping order, because that gets in the way of the more passionate interactions, unless he needs to protect one student from another with a potentially harmful advantage.
Clamdestine is said to have the "literature professor"-look down with his tweed suit with dark brown patches at the elbow accessorized with a large leather satchel.
Dr. Clamdestine makes an impression when, on the first day of the new school year, he enters the class just as the bell clangs, shuts down for thirty minutes to cleanse his mental palate, and brings up a pipe made of cheese as a prop to gain access to his intellectual persona. Unsure of how to handle this flamboyant teacher, the students start talking among themselves, which leads up to a confrontation between Cleo de Nile and Venus McFlytrap. Clamdestine, enjoying the drama unfolding before him, allows it to continue until Venus uses her pollens of persuasion to win the argument. Unable to let that go without reprimand, he has Venus sent to Headless Headmistress Bloodgood. A few days later, like almost everyone else at Monster High, he has come under Sylphia Flapper's mind control and is not freed until a few days later by the efforts of Venus, Rochelle, Robecca, and Cy.
- "Clamdestine" is a portmanteau of "clam" and "clandestine".