Mammal take in oxygen in the air while fish take in oxygen in the water.
Dolphins and whales are mammals so they don't have gills.
Mammals have lungs, as do amphibians, reptiles, and birds. Fish are the only chordates that have gills rather than lungs.
Rabbits, like all mammals, have lungs, not gills. Lungs are the respiratory organs of mammals, including rabbits, and they are adapted for breathing air. Gills, on the other hand, are the respiratory organs of aquatic animals such as fish and some amphibians. Gills are specialized for extracting oxygen from water, whereas lungs are designed for extracting oxygen from the air. Rabbits breathe by inhaling air through their nostrils, which then passes into their lungs, where oxygen is exchanged with carbon dioxide in the blood.
Monotremes are mammals; therefore they have lungs, not gills.
Lungs a similar in that they help to bring oxygen into the living things body. The difference is that gills are external and lungs are internal.
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 and breathe air like other mammals do. Gills are found in aquatic animals like fish, not in terrestrial mammals like kangaroos.
No, they have gills.Sharks do not breathe with lungs, but with gills that absorb the oxygen in the water.
Killer whales are aquatic mammals, they breathe through a single blow hole, which can be found on top of their heads. Like all mammals they have lungs, unlike fish which use gills to extract dissolved oxygen from water.
Whales are mammals !