Pangolins are covered by large sharp hardened and overlapping plate-like scales made of keratin, the same material as human fingernails and animal claws. Armadillos have a leathery shell formed by plates of dermal bone covered in relatively small, overlapping epidermal bony scales; echidna and tenrecs have spines.
Normally called a wolverine in North America, what is the largest carnivorous mammal in the weasel family, which, it is said, has a habit of hiding articles which are no use to it?
Which of these aquatic animals is a mammal ?
[C] River Dolphin