The term "seal" is a broad term used to describe all marine mammals that belong to the order Pinnipedia. This order includes three families:
* Phocidae (true seals, like the harp seal)
* Otariidae (eared seals, like sea lions and fur seals)
* Odobenidae (walruses)
So, while harp seals are part of the true seal family, they are also part of the broader group of animals known as seals.