Yes, lobster tail is served on one of the nights. This also comes with several shrimp. I think they called it the fisherman's plate. The lobster was what you typically see in restaurants not known as lobster places....a tail with the meat raised up out of the shell. But it was good and our waiter was at the ready to provide seconds if we wanted them. On an earlier night they had scampi-sized shrimp as an entree, and it was also very good. The lobster tail night also included the prime rib entree and one could get both of these just by asking.
The food on the Liberty was without question the best we've had on any RCI ship - and I include all venues in this assessment...main dining room, Windjammer, Sorrento's pizza, Cafe Promenade, etc. I was quite pleased with the food selections, preparation, and presentation. It is even more noteworthy when you consider we had over 4000 passengers aboard.