They can't. Dolphins and Whales have lungs, not gills. they have to Surface to Breathe. They hold their breath while diving.
all fish have gills. they have gills instead of lungs, so they can breathe under water. Whales and dolphins do not have gills because they are mammals.
Yes they are. All whales and dolphins are. They breathe through lungs not gills, must come to the surface to breathe, has fuzz on their beak when they are a baby (it falls off) and has live birth.
Dolphins are mammals, not fish. And mammals breathe with lungs, not gills.
Sharks are fish, and breathe with gills. Dolphins are mammals, breathe with lungs, and can't breathe underwater. They breath at the surface, then hold their breath - which they're really good at - while diving.
dolphins are mammals, not fish. They have lungs, not gills, and breathe air.
Dolphins breathe with lungs while sharks breathe with gills.
Whales breathe with lungs, and fish use gills.
Fish breathe with gills. By the way, whales do not. They breathe air, because they are mammals.
killer whales are mammels there for need to come up to take in air.fish however can breath under water.fish also lay eggs but killer whales and dolphins give birth to a smaller version of themselves
Yes. Yes they do breathe air with their lungs. Too easy!
One thing that fish have that whales do not have are gills. Fish need gills to breathe, but whales have a blowhole because they are mammals.
Dolphins and all whales need air to breathe because they are mammals with lungs, not fish with gills. they are believed to have evolved as land animals and then returned to the sea.