The Antarctic continent hides 10 extraordinary creatures that thrive in its icy realms, from feather stars that flutter like underwater bouquets to glass sponges that sparkle like frozen chandeliers.
10 extraordinary creatures you’ll encounter in Antarctica
10 Antarctic Feather Star
This Antarctic feather star, known scientifically as Promachocrinus kerguelensis, belongs to the crinoid family and makes its home on the seabed along the continent’s coast. It prefers the frosty waters surrounding Antarctica, and that chilly preference sets it apart from many of its tropical relatives.
Equipped with twenty feathery arms, the star filters plankton from the surrounding currents and also uses those limbs to glide gracefully when it decides to relocate. Its movements are surprisingly coordinated, giving the impression of an elegant underwater dancer.
9 The Comb Jelly
Comb jellies, or ctenophores, are translucent, gelatinous animals that propel themselves with eight rows of ciliary “comb” plates, making them the largest swimmers of this type on the planet. Their shapes vary from bell‑like to perfectly spherical, each gliding through Antarctic surface waters.
When sunlight hits their comb rows, they refract dazzling colors, and many species also emit a soft blue‑green bioluminescence, turning the water into a living light show. These creatures favor the slightly warmer, more acidic surface layer created by rising carbon dioxide levels.
Unlike jellyfish, comb jellies lack stinging cells; instead, they ensnare tiny prey with sticky secretions. A word of warning: even though they look ethereal, handling them is a bad idea – they’ll leave you wishing you hadn’t.
8 The Hoff Crab
The Hoff crab earned its nickname because its furry appearance reminded scientists of David Hasselhoff’s famously hairy chest. Officially called Kiwa tyleri, this crustacean makes its home along the East Scotia Ridge where seawater hovers around the freezing point of 0 °C (32 °F).
Because the water is too cold for the crab to thrive on its own, it clusters around hydrothermal vents—natural underwater geysers that spew warm, mineral‑rich water, creating a cozy micro‑habitat.
The crab’s “hairy” look actually comes from a dense coat of bacteria that it farms on its shell. Using specialized, comb‑like mouthparts, the Hoff crab scrapes off the bacterial colonies for a nutritious meal.
7 The Sea Spider
If you’re squeamish about eight‑legged monsters, the giant sea spider might give you pause. Despite its name and spider‑like silhouette, it’s actually a marine arthropod, not a true spider.
These sea spiders can reach a whopping 35 cm (14 in) across, a phenomenon known as “polar gigantism,” where cold‑adapted species grow larger than their temperate cousins.
One theory suggests that the frigid Antarctic waters slow metabolism, allowing the animals to survive on less oxygen. Since the surrounding water is supersaturated with oxygen, the sea spiders have been able to evolve a larger body plan over time. They’re also found in Arctic seas.
6 Antarcturus sp.
Antarcturus sp. is a little‑known deep‑sea isopod that inhabits the chilly waters of the Southern Ocean. Belonging to the Antarcturidae family, these crustaceans make their homes on sponges and coral branches.
The creature’s sturdy limbs act as armor against predators, and when hunger strikes, it extends long frontal appendages to snatch passing planktonic morsels.
5 The Scale Worm
The Antarctic scale worm, also called Eulagisca gigantea, is a striking marine worm that lives on the seafloor. Measuring about 20 cm (8 in) long and 10 cm (4 in) wide, it belongs to the Polynoidae family and sports a series of protective scales called elytra.
Its most unsettling feature is a retractable proboscis that looks like a head but is actually a mouthpart. When it spots prey, the worm unrolls this elongated proboscis and tears the victim apart with ferocious efficiency.
4 The Sandhopper
The sandhopper is a sizable amphipod—a type of crustacean—that thrives in both the icy Antarctic waters and on land. Its nickname comes from its impressive jumping ability: when startled, it curls its tail and launches itself forward.
Despite its size, the sandhopper is less intimidating than many of its deep‑sea cousins. If you enjoy seafood like lobster, crab, or shrimp, you’ll find this creature’s relatives quite familiar and unthreatening.
3 The Sea Pig
Sea pigs, a type of sea cucumber, measure roughly 10–15 cm (4–6 in) in length and congregate in large groups on the ocean floor near Antarctica. Though abundant, they dwell in the deepest reaches of the Southern Ocean, making sightings rare.
These creatures play a crucial ecological role by consuming detritus, mud, and decaying organic matter, much like earthworms do on land. Their reproductive habits and lifespan remain mysterious to scientists.
Don’t be fooled by the name—sea pigs don’t taste like bacon and actually contain toxins, so they’re definitely not a culinary delight.
2 The Springtail
Springtails are tiny hexapods that resemble insects and are affectionately dubbed “the elephants of Antarctica” because they’re the largest animals that live exclusively on land there. Most individuals measure less than a millimeter (0.04 in) in length.
Unlike true insects, springtails possess internal mouthparts, yet they look a lot like earwigs. Their diet consists mainly of fungi and bacteria, which they graze from the soil surface.
These critters enjoy relatively long lifespans for such small organisms, typically living one to two years. Researchers have discovered that Antarctic springtails outlive their temperate‑zone cousins, thriving in glacier‑free regions of Victoria Land and the Antarctic Peninsula.
To survive the extreme cold, springtails can dramatically slow their metabolism and produce glycerol, a natural antifreeze that lowers their freezing point. However, if conditions become too harsh, even these hardy survivors will perish.
1 Glass Sponges
Antarctic glass sponges may not look like the kitchen sponges you use for dishes, but their skeletons are made of silica—a glass‑like material. This gives them a shimmering, almost crystalline appearance.
These sponges are opportunistic feeders, gobbling up any organic debris that drifts by. Once thought to be growth‑stunted, scientists discovered in 2013 that they can actually grow quite quickly, especially as ice shelves recede.
The retreat of Antarctic ice shelves has sparked a boom in glass sponge populations, prompting researchers to investigate two key questions: how these sponges influence marine ecology and whether they could serve as significant carbon‑storage agents.
Miriam Slozberg is a Canadian mom, blogger, astrologer, ghostwriter, and freelance writer who has an eccentric sense of humor and way of thinking.