Mammals have lungs, as do amphibians, reptiles, and birds. Fish are the only chordates that have gills rather than lungs.
Mammals have lungs.
Dolphins and whales are mammals so they don't have gills.
Monotremes are mammals; therefore they have lungs, not gills.
Mammals breath using lungs.
Dolphins are mammals, not fish. And mammals breathe with lungs, not gills.
All mammals breathe with lungs.
Kangaroos have lungs - they are mammals.
Whales are mammals !
dude really it's gills ...All mammals have lungs
No. These animals are mammals, they breathe air.
Killer whales are mammals and have two internal lungs. They are not fish, and therefore have no gills.
No, leopard seals are mammals and have lungs, only fish have gills.
A sea otter is a mammal, so it has lungs.