No, they have gills.
to breath
Clams breath through gills much like fish.
yes they do need the air that we breath out
I have no idea but it is air I only can breath in.
not if you are a fish
so you can breath
They help us because they give off the air we need to breath. They help us because they give off the air we need to breath.
yes penguins do need air to breath underwater.
Why it's unhealthy to not breath is that your lungs need the air we breath in now so we can breath and other things.
Well its not like we need to breath.
Under water doesnt have enough air molucules that we need. Therefore we cant breath underwater. :)
A polar bear is a mammal and all mammals need air to breath.