Yes, are born tail first to prevent from taking in water in their lungs
yes
As dolphins are mammals they breath air like us, humans.
dolphins are mammals, not fish. They have lungs, not gills, and breathe air.
Dolphins must go to the surface, because they breathe air. Dolphins are mammals, not fish.
Dolphins are mammals, they Breathe air. If trapped underwater they eventually suffocate or drown.
Dolphins are mammals, which means they are warm-blooded. Warm-blooded creatures thrive better in warm water and this is what most dolphins prefer.
A few dolphins can be found at the Underwater World in Sentosa. The future Integrated Resort (IR) at Sentosa will also have dolphins.
they can breathe and survive underwater.
To detect underwater mines and submarines.
By sending out sound
no they live in rivers
1 mile per hour