They do, they just use gills to extract the air in water.
Sharks do not need to come up for air - they are fish with gills.
No, sharks don't have air sacs. Instead they have gills.
scissor sharks are extinct and the answer is not this ( because, i dont know)
sharks dont mean to be its just a part of nature.
Sharks are not mammals because, all mammals have body hair and as far as I know sharks have no hair.
Sharks dont have internal systems, they just have air between thier body.
they dont
Whales and sharks dont have eyelids because instead they metmorphisize
smaller reef sharks do but larger sharks dont bother
sharks dont lay eggs...
no they dont
cause they dont! !