Grey Seal (Halichoerus grypus) lives in coastal waters, beaches, islands and sea ice across North Atlantic, North Sea, Baltic Sea. Its conservation status is Least Concern.
Fascinating facts about the Grey Seal
- Around 632,000 grey seals roamed the North Atlantic in 2016. The world's biggest rookery sits on Sable Island, Nova Scotia, where an estimated 76,600 pups were born in 2021 alone. Such sheer numbers fuel a massive predator-prey link: they support orca hunts and provide a food source for gulls and eagles, while also pressuring fisheries that share their fish-rich waters.
- Grey seal pups double-check nature's fast-track: in just 18 days they quadruple their birth weight, thanks to milk that can be up to 60 % fat. A newborn weighing 11-20 kg (24-44 lb) can gain roughly 1.5 kg per day, turning a tiny fluff ball into a blubbery youngster ready for the sea. This rapid fat build-up is crucial because mothers fast for weeks, losing up to 40 % of their own weight while nursing.
- Male grey seals can reach up to 2.3 m (7 ft 7 in) and weigh as much as 310 kg (680 lb), while females stay under 2 m and 190 kg (420 lb). In the western Atlantic, bulls often hit 2.7 m (8 ft 10 in) and 400 kg (880 lb).
- Grey seals have a secret language beneath the waves: they clap their flippers underwater to signal each other. Monash University researchers captured this behaviour, suggesting the claps may deter predators or attract mates.
- Spook, a male grey seal at New York Aquarium, holds the record for longevity in captivity at 43 years, far beyond the typical 30-year wild lifespan. He stretches eight feet and weighs 750 lb, embodying the species' massive build.
Sources
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At a glance
RangeNorth Atlantic, North Sea, Baltic Sea
HabitatCoastal waters, beaches, islands and sea ice
DietFish and squid
About the Grey Seal
As the grey seal glides effortlessly through the crystal-clear waters, its sleek, streamlined body undulates with a hypnotic rhythm, propelling it with remarkable agility in pursuit of its prey. With large, dark eyes that seem to hold a deep wisdom, this charismatic creature navigates the waves with an air of quiet confidence, its flippers beating in a slow, powerful motion as it explores the underwater realm. In the dimly lit depths, the grey seal's distinctive vocalizations echo through the darkness, a haunting serenade that resonates through the ocean's twilight world.
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