How sea animals like dolphins, seals are able to survive in aquatic habitat without gills?
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they came outside of the water for breath and they swim on water surface
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You see , these are all the eg of mammals
Mammals don't have gills , they got lungs (except a few cases)
You usually see that Dolphins and seals jump out of water frequently , it is to refill their lungs with fresh air . Their Breath holding capacity is much more than us so they need to resurface rarely.
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