To extract oxygen out of the water in order for it to survive.
Yes - see related answers.
Shark has only gills
The gills of a shark (and other fishes) extract oxygen from the water, allowing the shark to breath.
Gills on a shark help it take oxygen out of the water.
The gills of the shark.
shark's gills are open.
i think that they have gills as they are a shark
No, the sand shark is a fish with gills.
it helps the shark breathe
All whales have lungs. No whale has gills. The whale Shark has gills, but that name comes from it being a Shark - a fish - the size of a whale.
Sharks have gills so they can breathe. They absorb the oxygen out of the water using their gills.
it has gills
A shark has gills like a fish so that is how it breaths.