What Is the Deepest-Living Shark?
The deepest-living shark is the Portuguese dogfish, Squalus acanthias. It has been recorded at depths exceeding 2,000 meters, far below most other shark species. This makes it one of the most extreme deep-water sharks known to science.
How Does It Survive at Extreme Depth?
The Portuguese dogfish has a slow metabolism and a large liver rich in squalene, which helps it maintain buoyancy. Its body is adapted to low temperatures and high pressure. These traits allow it to hunt efficiently in the deep ocean where food is scarce.
Where Is the Deepest-Living Shark Found?
Portuguese dogfish are found in temperate and tropical oceans worldwide. They prefer continental slopes and deep-sea habitats, often near the seabed. Their wide distribution and deep range make them one of the most widespread deep-water shark species.
