Clams

Clams are an animal life form and a type of mollusk. They are also known for their usage as an edible food item, which may be steamed or added to other culinary dishes such as clams casino. The opposing shells of a clam seem to form a large grin, giving rise to the phrase, "Happy as a clam".

In chapter three of the "Genesis of the Daleks" storyline from the original Doctor Who, the Fourth Doctor and his companion Harry Sullivan avoided the jaws of a large mutant alien clam on the planet Skaro.

In the first Aquaman adventure from Filmation's the Superman-Aquaman Hour of Adventure titled "Menace of the Black Manta", a berserk killer whale unseated Mera from her seahorse and she fell inside of a giant clam where she became trapped. Feeling as though she was safely tucked away, her colleagues Aquaman and Aqualad left her there while they went off to deal with Black Manta. Dicks.

In the pilot episode of the comedy series Bosom Buddies, Hank Desmond (under his transvestite alias of Hildegard) told an assembly of people that she was "Clappy as a ham", when she really meant to say "Happy as a clam".

Episode 1x21 of the comedy series Scrubs was titled "My Sacrificial Clam".

Episode 3x10 of the cartoon series My Little Pony: Friendship is Magic was titled "Keep Clam and Flutter On", which is a rewording of the phrase "Keep calm and carry on".