Gagh

Memory Beta, the wiki for licensed Star Trek content.

Gagh (also known as ghargh) is a worm that is prized by Klingons as a live food. These creatures are also commonly eaten by sea pochtoQs. (ST novel: Excelsior: Forged in Fire)

Whilst the dish is intended to be eaten live, it is not swallowed live. Instead, the worm is killed between the teeth, with the blood being consumed as a delicacy. Swallowing live gagh results in the worm surviving in the intestines as a parasite. William Riker discovered this fact after serving aboard the IKS Pagh in 2365, as part of the Officer Exchange Program. (TNG novel: A Time to Kill)

Some prefer racht, the other live worm dish. (TNG novel: Before Dishonor)

There were more than fifty-one varieties of gagh. Bithool gagh was prefered by B'Elanna Torres. (ST reference: Star Trek Cookbook)