Best Somniosidae
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The Greenland shark (*Somniosus microcephalus*) is a deep-sea shark species notable for its exceptional longevity. Scientists estimate individuals can live over 400 years, making it the longest-lived vertebrate known. Primarily found in Arctic and North Atlantic waters, this large, slow-moving fish...
Pacific Sleeper Shark (Somniosus pacificus) is a large, slow-moving shark closely related to the Greenland Shark, found at depths exceeding 2,000 m throughout the North Pacific.
Southern Sleeper Shark (Somniosus antarcticus) is a large apex predator of the Southern Ocean closely related to the Greenland Shark and documented feeding on Antarctic toothfish.
Portuguese Dogfish (Centroscymnus coelolepis) is one of the deepest-living sharks known, recorded at depths exceeding 3,600 m in the Atlantic and Pacific Oceans.
Zameus squamulosus (Somniosidae), a cosmopolitan deep-sea squaliform shark recorded at 200–2,000 m worldwide, named for its distinctively dense, velvety skin texture.
Longnose Velvet Dogfish (Centroscymnus crepidater) is a small deep-sea shark in family Somniosidae found across the Atlantic and Indo-Pacific at depths exceeding 1,500 m.
A deep-sea squaliform shark (Somniosidae) allied to the velvet dogfish but distinguished by notably enlarged dorsal fin spines, found in mesopelagic and bathypelagic waters.
