Crabeater Seal

Fascinating facts about the Crabeater Seal

• A crabeater seal can filter 18,000 krill from the water in a single dive using teeth that evolved into a sieve. Their molars have sharp cusps that interlock perfectly — when the seal closes its mouth, water is forced out through the gaps while krill stay trapped inside, like a living baleen whale. They're the most abundant large carnivore on Earth, outnumbering all other seal species combined at around 40 million individuals.
• Despite their name, crabeater seals almost never eat crabs. Scientists think early whalers misidentified the species and the wrong name stuck for 200 years. DNA evidence shows their closest relative is the leopard seal — a fierce Antarctic predator — yet crabeaters evolved to be filter feeders in the same water where leopard seals hunt them.
• A crabeater seal can hold its breath for 20 minutes while diving 600 metres below the pack ice, hunting krill in near-total darkness. At that depth, water pressure reaches 60 atmospheres. Their lungs collapse like an accordion and their heart rate drops to 15 beats per minute, a survival trick shared only with deep-diving whales.
• Leopard seals — the apex predators of Antarctica — hunt crabeater seals specifically at breathing holes in the ice, waiting motionless for hours. About one in three crabeater seals bears scars from leopard seal attacks, the highest predation rate of any seal species. Some individuals have survived five separate mauling attempts and carry the wounds like a battle record.
• Crabeater seals live in one of Earth's harshest nurseries: they give birth on floating pack ice that melts beneath them while they nurse their pups. A mother must teach her calf to swim and dive within 5–6 weeks before the ice vanishes entirely, compressing a critical survival window into less than two months. Climate change is shrinking that window further, forcing seals to choose between abandoning pups and staying on ice that won't hold them.

At a glance

About the Crabeater Seal

In the dimly lit, icy waters of Antarctica, the crabeater seal glides effortlessly, its sleek, serpentine body undulating through the darkness as it pursues the krill that sustain it. With eyes adapted to pierce the gloom, this formidable predator navigates the treacherous landscape of ice floes and underwater canyons with a silent, ghostly precision, its very existence a testament to the unforgiving yet majestic power of the polar seas. As it breaks the surface, its tawny fur glistens with dew, a fleeting glimpse of a creature that is at once beautiful and resilient.

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