Beast Species: Sarlacc
If a Sarlacc hits with one of its tentacles against a Huge or smaller opponent, it can automatically make a grapple check with its tentacle attack at its full bonus (even if it has already taken a full-round action). If the grapple check is successful, the Sarlacc can make an opposed grapple check each round to move the grappled creature 1 square closer, until it pulls the creature into its maw.