Quote from Julie Teeger in Mr. Monk and the Red Herring
Julie Teeger: This is Mr. Henry. Adrian Monk: [to Natalie] We gotta grab that rock. Julie Teeger: Mr. Henry is a marble fish. And most marble fish only live for about a year. But Mr. Henry is six years old, and he's still as frisky as ever. And that is thanks to my special diet of ground-up vitamins, rice crispies, and cucumbers.