There's heaps in there PAT, Im not sure exactly how many, but probably around 50. Its a reasonably big exhibit too.
I didn't know they did a alligator feeding show actually, but this guy doing it (who did all the shows I saw), is extremely funny and makes the shows incredibly entertaining, interesting and interactive.
I usually avoid shows/presentations/encounters at zoos because I find them boring and of little value to myself, but the shows at the Australian Reptile Park were brilliant and I didn't getbored watching any of them (I watched like 5 on my last trip - all presented by this guy).
Some of them were HUGE! Just look at the jaws of the Alligator immediately to the right of the one grabbing the food - he is twice the size of the others.