Head to head
Pacific Sleeper Shark vs Greenland Shark
Pacific Sleeper Shark
VS Greenland Shark
The Pacific sleeper shark and Greenland shark belong to the same genus of slow-moving, cold-water sharks, but their documented records and specific range differ.
| Pacific Sleeper Shark | Greenland Shark | |
|---|---|---|
| Scientific name | Somniosus pacificus | Somniosus microcephalus |
| Native range | North Pacific | North Atlantic, Arctic |
| Notable record | Giant squid remains found in stomach | Longest-lived vertebrate known |
| Flesh | Not specifically documented as toxic | Toxic unless fermented |
| Swimming style | Slow, sluggish | Slow, sluggish |
| Conservation status | Near Threatened | Vulnerable |
| Population trend | Decreasing | Decreasing |
| Habitat | Ocean | Polar, ocean |
Pacific Sleeper Shark vs Greenland Shark: common questions
Are the Pacific sleeper shark and Greenland shark closely related?
Yes, both species belong to the same genus, Somniosus, and share a similarly slow, energy-conserving swimming style suited to the cold deep water both inhabit.
Which species is the longest-lived vertebrate, the Pacific sleeper shark or the Greenland shark?
The Greenland shark holds that record, with one female radiocarbon-dated at up to 512 years old, a documented lifespan not established for the Pacific sleeper shark.
Can you eat Greenland shark meat like you might eat Pacific sleeper shark?
Greenland shark flesh is toxic when fresh and must be fermented into the traditional Icelandic dish hakarl to be safely eaten, a specific toxicity not documented as a defining trait of the Pacific sleeper shark.