In Star Wars: The Empire Strikes Back, we see R2-D2 falling into a deep bog upon Luke's arrival at Dagobah. He is then ingested by a beast and spat out upon the shore.
In the original script, this sequence is as follows:
Suddenly, through the thick fog layer, a dark shape appears, moving toward the little droid. The dark, sinuous bog beast dives beneath the swampy water, making a loud clunk against Artoo's metal hull. The droid disappears from sight, uttering a pathetic electronic scream.
In the script, the beast swallowing Artoo is called a 'bog beast.' Is there a more technical name for this creature, or is it only referred to as a 'bog beast?'