Sarlacc

Just what are you trying to say here, George?

The Sarlacc is an enormous beast that lives beneath the sands of Tatooine. Feeding enemies to the Sarlacc became one of Jabba the Hutt's favorite forms of execution. He told those that he fed to it that they would "know a new definition of pain and suffering, as you are slowly digested over a thousand years."

Attributes

The Sarlacc is an immobile creature that presumably survives by capturing any animal that wanders near, having created a sand-pit trap much like that of an antlion. The Sarlacc's mouth lies at the bottom of the pit. Tentacles around the mouth grab at nearby creatures to drag them down to be swallowed.

Whether it would actually take a thousand years for the Sarlacc to digest a humanoid meal (let alone whether the victim would be alive, aware, and suffering for that long) is unconfirmed.

The Mandalorian

The Mandalorian indicates that the Sarlacc used by Jabba for executions is not unique. Their breeding cycle was not described, but apparently they are sometimes preyed upon by Krayt dragons.