Calf or pup?

Question:

I recently was gifted your word study card set. I am wondering why the animal adult/young group has the match of a seal and calf. Isn’t the young of a seal a pup? The young of the walrus is named a calf.

Answer:

Thank you for noticing this! We love your human tendency for precision.

It's true that seal young are commonly known as pups. Curiously, the term seal also refers broadly to all pinnipeds which include seals and walruses. Thus, pinniped young can be known as pups or calves.