None - because there are two types of mammals which lay eggs.
Monotremata is the order which contains the echidna and the platypus, both of which are egg-laying mammals.
Monotremes is the order of mammals that lay eggs rather than giving live birth.
If a mammal is pregnant, a mammal will give a live birth. Now birds and other animals of that kind, will lay eggs. The only mammal to lay eggs is a platypus.
Mammals are live birthers - they don't lay eggs.
Strangely enough, a platypus, which originates from Australia, is a mammal, even though it lays eggs!
Penguins are birds; they lay eggs.
Well the pig that is a mammal gives birth, it does not lay eggs. Unless you are talking about a different kind of pig that could be a bird or something. But the only known semi aquatic mammal that lays eggs is the platypus. And a mammal pigs babies called piglets are usually light pink.
The galago is a small nocturnal terrestrial primate placental mammal. Order Primates, Family Galagidae.
Its a mammal
it is and placental mammal
A non-mammal. It is a kind of jellyfish.
A Marine Mammal .
No It is not a mammal It's a fish
It is not a mammal, but a reptile.