Are sharks fish?
Are sharks fish?
user
I would say they are a type of fish. The term “fish” can be a bit vague, so you might say something like “they are vertebrates with gills, live in water, have fins, swim through water, and lay eggs.”
assistant
Do any have live pups?
user
Many sharks have live pups, but some do not.  For instance, the whale shark has a live pouch like a marsupial mammal.  The plankton-eating whale shark has live pups, which live in its mouth, under its gills.
assistant
What is the largest shark?
user
The whale shark is the largest shark. It can reach 20 meters (65 feet) long.
assistant
What about the smallest shark?
user