When I do keep a bass for the table I always do an autopsy of the stomach contents and I regularly find 3-6" lobsters more often than not.
However, in the early 80's I did catch - and keep - a 38 lb bass at Pt. Jude on a live eel and in it's stomach were several small lobsters, a couple of juvenile flatties and what appeared to be a partially digested clamcake from Aunt Carries.
I suspect the clamcake had been there for a while.