There are too many to list. -All mice, rats, shrews, beavers and similar, all antelopes and similar, etc.
yes it is waterproof. they coat their fur with castoreum to make it waterproof.
Monotremes are terrestrial egg-laying mammals, and as such they have fur. The platypus's fur is thick, velvety and waterproof, while the echidna has thick fur, through which grows a defensive set of sharp quills.
Koalas are mammals, and most mammals have skin, either with or without fur or hair. In the case of the koala, the fur has particular functions. The koala's fur helps to keep it cool in summer and warm in winter. Its outer layer is partially waterproof, so that when rains do come, the koala does not become saturated.
Yes they are
Placental mammals do not all have fur. Maine mammals such as dolphins, whales and dugong do not have fur.
Most mammals have fur or hair .
Platypuses have two layers of fur, which is contrary to what some websites will report. The layer closest to their skin is woolly and helps insulate the platypus against the cold water in which they live in the southern states and alpine areas. The outer layer is waterproof.
Fur seals are mammals
yes
Terrestrial placental mammals do have fur or hair. Marine placental mammals do not.
Seals are mammals, and all mammals have a body covering of skin, hair or fur. Although the seal's hair may not be visible, it is still present.
No. Penguins are birds, they have feathers, not fur.