How many whale shark pups are born at one time?

Whale sharks (Rhincodon typus) are ovoviviparous fish, which means that they produce eggs that hatch and develop inside the mother's body. However, unlike most other ovoviviparous animals, whale shark females don't give birth to live young. Instead, they release hundreds or even thousands of fertilized eggs into the water, where they are left to develop and hatch on their own. Once hatched, the young whale sharks are on their own and must fend for themselves.

So to answer your question, the number of whale shark pups born at one time is actually zero. Instead, whale sharks produce and release a very large number of fertilized eggs, each of which has the potential to develop into a new individual.