Hi, Rickard-
Please stop back a few times over the next couple of weeks to see what responses you get. I ordered a DVD of the movie to get a chance to hear what you're talking about, but the DVD probably won't arrive until the end of next week. By the way, there were shanties in the 1956 movie of "Moby Dick."
Maybe somebody with Netflix can download the movie and make a stab at transcription.

Our Digital Tradition Folk Song Database has five songs related to "Blow Boys Blow," and we have two previous threads on the songs. I've crosslinked the song versions and the threads - you'll see the crosslinks up top.

All the best to you.

-Joe Offer-
joe@mudcat.org