[ErnBatavia]

Is "Gaggle" the proper term for such a humanoid herd?

[Paul Atreides]

I don't know, what does one call the offspring of a whale?

[Between the Lines]

Is "Gaggle" the proper term for such a humanoid herd?

While you would have a gaggle of geese, a heard of cows, a pod of whales and an ambush of tigers, the proper term for such a group of people is a family or a crowd. I believe crowd applies in this instatnce.