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Brief：
Answers: because they have gils which allows them to only breathe insideof water. you need lungs to breathe air. Because they have gills that filter O..
Answers:
because they have gils which allows them to only breathe insideof water. you need lungs to breathe air. Because they have gills that filter O2 from the water. same reason we'd die if submerged in water. They suffocate. Fish are adapted to extract oxygen from water (through the gills), not directly from the air (which requires lungs). They are designed to extract oxygen from water, we are designed to extract oxygen from air Because their gills can not absorb oxygen from the air, only from water (a liquid medium).
Our lungs can only absorb oxygen from air (a gaseous medium). they cant breathe b/c they can not breath air.they have no lungs they breath oxygen in the water and when they are out of the water there is no oxygen for them and they die, it's like holding your head underwater for a very long time, you die, same thing only reversed. because they can't breath outside!! SAME REASON YOU WOULD IF I HELD YOUR HEAD UNDER WATER THEY DROWN ! MUPPET Don't know?
The other day 2 got battered at our chippy! cuz they bloody suffercate u nutter !
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