Because they breathe through their gills.
Fish breathe underwater using their gills. As water passes over their gills, oxygen is absorbed from the water and carbon dioxide is released. This process allows fish to extract oxygen from the water and breathe efficiently.
No. Only fish can. No other animals have gills or means of breathing underwater. Well, except those who have oxygen tanks that is. THEN you can breathe underwater.
Fish use gills to breathe underwater.
well yes they do 'breathe' underwater with their gills
Yes they breathe through their gills using the oxygen in the water.
they can breathe and survive underwater.
if they breathe underwater... <=< FISH
They can breathe, swim, and live underwater.
I will assume you are not joking. A fish does not hold it's breath it can breathe underwater using its gills.
dolphins are mammals, not fish. They have lungs, not gills, and breathe air.
Of course not. Humans are only able to breathe underwater for a few seconds.
Their entire lives. They can breathe underwater, so they never have to come up.