If it’s the music i’m thinking of, that was never present in any of the English releases, theatrical or home, and only present in the early German versions.
It’s this track:
https://www.youtube.com/watch?v=75mYKwsF-IM
The specific part starts at 2:10
Only in the early German versions? That’s mind-boggling. Too bad that this music piece is missing because it augments greatly the tension & atmosphere when the dianoga grabs Luke und pulls him unterwater.