None of them does, unless they're not a shark. Sharks are fish, and fish don't have lungs like whales, which are mammals, do.
Shark has only gills
Lungs
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.
i think that they have gills as they are a shark
Whale Shark
A shark
the whale shark
No, they have gills.Sharks do not breathe with lungs, but with gills that absorb the oxygen in the water.
the bull shark
The Megalodon shark which is Greek for "big tooth" .
Greenland Shark
The Greenland shark (Somniosus microcephalus) is a shark that must live in the sea, and breathes through gills. A reptile is able to breath air using lungs and can live in or out of water.