There is nowhere on Earth with wildlife quite like the fauna of Antarctica, surviving frigid temperatures and swimming in near-frozen seas.
The animals you'll encounter here have adapted to conditions found nowhere else on the planet, which means the wildlife in Antarctica feels otherworldly and visiting here on an expedition is your only opportunity to witness it in the wild.
Whether it's a humpback whale surfacing just metres from your Zodiac or a colony of penguins keeping new chicks warm, this is nature on its own terms. The best time to see it all is during the Antarctic summer, from November through March. When the ice retreats in the warmer months, the days stretch well into the night and the Southern Ocean comes alive.
Here's what you can expect to see, month by month and species by species.
Whales of Antarctica
Few wildlife encounters compare to seeing a whale breaching the surface next to ice floes and icebergs in Antarctic waters. The nutrient-rich Southern Ocean supports one of the greatest concentrations of whales on the planet, and expedition cruising puts you closer to them than almost any other form of travel. You’ll often get close enough to hear them breathe and sing beneath the surface.
From the deck of a small ship, or gliding alongside one in a Zodiac, whales in Antarctica are less a sighting and more an experience you'll be recounting for years.
Humpback Whales
The whale most cruise passengers hope to see, humpbacks reaching up to 16 metres in length. Iconic for their acrobatic breaches and distinctive long pectoral fins, they gather in large numbers around the Antarctic Peninsula and the Gerlache Strait to feed on krill.
Due to their migration pattern, sightings of humpbacks in Antarctica pick up from December and peak through January and February, when krill swarms are at their thickest and the whales linger for weeks at a time to feed. During the other months they’re likely swimming north to warmer waters to give birth
Minke Whales
The smallest species of baleen whales found in Antarctic waters, minke whales grow to just seven to 10 metres. They’re more solitary and elusive than their humpback cousins, though no less thrilling to spot. Minkes also breach and can actually get their entire bodies above the surface when doing so.
If you’re keeping an eye out, they're often seen close to the ice edge and pack ice throughout the Peninsula region, feeding on krill and small fish. Minkes tend to be spotted from November right through to March.
Blue Whales
Stretching an immense 27 metres long, the whale is the largest animal currently alive. In fact, it’s just as long as a Boeing 737.
Unlike other species, they are more of a rare sighting in Antarctica waters as their numbers were devastated by historic whaling and are yet to fully come back. Small populations still feed in the deeper waters south of the Antarctic Convergence (the 50 kilometres of water surrounding Antarctica). These massive mammals subsist almost entirely on krill.
You’ll want to keep binoculars handy; sightings are uncommon. The best time to spot them is around January and February, when feeding grounds are richest. Seeing one at all is considered a highlight of a lifetime.
Orcas
Orcas, or killer whales, are the ocean's apex predator but are one of the most intelligent species you'll encounter on an Antarctic voyage. Males can reach up to nine metres and travel in tight-knit family pods around the Antarctic Peninsula and the pack ice edge.
They hunt seals, penguins, fish and sometimes even other whales. Orca sightings are possible throughout the Antarctic expedition cruise season, but many expedition guides consider December to February to be the time window. This is when seal pups and penguin chicks are most vulnerable and the orcas know it.
Sperm whales
Like the blue whale, sperm whales are less commonly seen on Antarctic Peninsula voyages but they do live here. They tend to favour the deeper, colder waters further offshore where they dive to extraordinary depths in search of squid.
Males can grow to up to 18 metres long and are distinguished by their massive block-shaped heads and small mouths. If your itinerary ventures into deeper sub-Antarctic waters, particularly around South Georgia Island, keep an eye out from December through February, when sightings are most frequently reported.
Penguins of Antarctica
If one animal defines Antarctica, it's the penguin. In fact, they live exclusively in the southern hemisphere (aside from a few equatorial birds in the Galapagos Islands).
Several penguin species call the frozen continent and its surrounding islands home, and expedition cruises offer the opportunity to get off the ship and stand on shore while thousands of them carry on their daily lives all around you. From a safe distance, you’ll be able to watch them waddle to and from the sea, feed young chicks, and squabble over nesting stones.
Emperor Penguins
The largest and most iconic of all penguin species, emperor penguins stand around 110–130 centimetres tall. That’s right, the largest of all penguins barely stands the same height as a nine-year-old child.
Emperors are found primarily on the fast-moving ice of the Weddell Sea, near the Antarctic Peninsula, and the Ross Sea, which sits south of New Zealand, feeding on fish, squid and krill in the frigid waters beneath the ice.
Because their colonies are so far south, sightings are more rare and typically only possible on specialised voyages into the Weddell Sea during November and early December.
Adélie Penguins
Adélie penguins are smaller than emperors, at around 70 centimetres tall, but tougher than most breeds. They breed further south than almost any other penguin species, nesting in dense colonies along the Ross Sea coastline and parts of the Antarctic Peninsula. Adélies feed mainly on krill and small fish.
The best time to see them is from November to January, spanning courtship, egg-laying and the frantic-yet-adorable early weeks of chick-rearing.
Gentoo Penguins
Recognisable by the white patch above their eyes and their bright orange-red bills, gentoo penguins are the fastest swimming penguin species. But, as zippy as they are beneath the surface, they’re among the most commonly encountered on Peninsula voyages.
They favour ice-free coastal areas and sub-Antarctic islands, such as South Georgia and the Falkland Islands, where they feed on krill, fish and small squid. Gentoos can be seen throughout the entire cruising season. However, December and January are when chicks are hatching and can first be seen.
Chinstrap Penguins
Aptly named, chinstrap penguins, can be identified by the narrow black band under their heads. They’re prevalent on the South Shetland Islands and along the the Antarctic Peninsula. They are best observed during their breeding season from December to February.
Seals of Antarctica
Often seen hauled out on ice floes in improbable numbers or basking in the southern sun on beaches, seals are a definite highlight to any expedition – especially when it’s peak season so see adorable pups.
Then Antarctic waters are home to several species, each with a distinct role in the ecosystem, from gentle grazers to formidable predators.
Leopard Seals
Sleek, powerful and recognisable by their curiously reptilian head shape, leopard seals are Antarctica's most formidable seal predator. They’re quite large, too, reaching up to 3.5 metres long.
They're found throughout Peninsula waters and along the pack ice edge, preying on penguins, krill, fish and even other seals. They're seen throughout the Antarctic cruising season, though sightings tend to be most frequent from December through February, when penguin colonies with young chicks provide abundant hunting opportunities.
Weddell Seals
Found in and around the sea of the same name, Weddell seals are known for their calm, curious temperament and their remarkable diving ability. These three-metre creatures can reach depths of over 600 metres in search of fish and squid.
They can be spotted throughout the summer season, with November and December offering particularly high opportunities for sightings as pupping season gets underway.
Ross Seals
Among the least seen of all Antarctic seal species, Ross seals are elusive, deep-water hunters and are rarely encountered close to shore. Reaching around two metres in length, they tend to favour dense pack ice floating in the Ross Sea.
Their main food sources, squid and fish, live at a considerable depth meaning they spend much of their time deep diving. A Ross seal sighting is a genuine rarity even for seasoned expedition staff, with the best chances falling in December and January.
Elephant Seals
Easily identified by their trunk-like proboscis, the elephant seal is by far the largest of all seal species. They grow up to five metres long and can weigh several tonnes.
They tend to gather in large groups on the beaches of the , like South Georgia and Australia’s Macquarie Island. They spend long stints on shore between deep dives for food, making them easier to spot, especially between November and January when pups are around.
Crabeater Seals
Despite the name, curiously, crabeater seals actually feed almost exclusively on krill, filtering it through specially adapted teeth. Spotted by its pale colouring and thinner body than most other Antarctic seals, crabeaters are actually the most common species in these far-southern waters. Somewhere around 7 million of them can be found, with easy sightings on ice floes happening between December and February.
Antarctic fur Seals
Despite their name, the Antarctic fur seals tend to be found around the sub-Antarctic islands rather than in the depths of Antarctica. They feed on krill and fish that live around these islands, with South Georgia being one of the most prominent homes with between 4-6 million living there alone.
With prominent ears and plenty of fuzz, Antarctic fur seal pups are especially adorable. They can be spotted from November to January.
Flying birds of Antarctica
While the prominent penguin has made its home on the ice and in the waters that surround it, up in Antarctica's skies are thriving flying bird populations. It’s home to some of the most remarkable seabirds on Earth that have evolved to thrive in this harsh climate. They’re built for endurance and capable of travelling extraordinary distances across the Southern Ocean without ever touching land.
Albatrosses
Few birds capture the spirit of the Southern Ocean quite like the grand albatross. These feathered giants glide for hours with wingspans that can stretch beyond three metres without a single flap.
Wandering Albatross
The wandering albatross holds the record for the largest wingspan of any living bird, up to an incredible 3.5 metres – that’s nearly the length of a small car.
They breed on the shores of sub-Antarctic islands like South Georgia, feeding on squid and fish that swim offshore. Their breeding colonies are most active (and most visible to travellers) from November through January.
Black-Browed Albatross
Smaller than the wandering albatross but far more numerous, the black-browed albatross has a wingspan of just 2.2 metres. They nest in dense colonies on steep shores and cliffs of sub-Antarctic islands including the Falklands.
They feed on fish, squid and krill, and are commonly seen following ships throughout the summer season. Breeding activity peaks from November to January and you can expect the colonies to be very loud as the birds cackle to mark their territory.
Petrels and Shearwaters
Petrels and shearwaters are the tireless wanderers of the Southern Ocean, expert gliders that spend the vast majority of their lives at sea.
Snow Petrels
Pure white and striking against the dark Antarctic seas, snow petrels are quite small compared to other Antarctic birds at around 30–40 centimetres. They tend to nest on rocky outcrops close to the Antarctic continent where they feed on fish and krill. Birdwatchers can easily find them throughout the cruising season, with nesting activity concentrated from November to January.
Cape Petrels
Distinguished by their bold black-and-white plumage, Cape petrels are frequently seen flying behind expedition ships in large, noisy flocks. They breed on cliffs around the Antarctic Peninsula as well as on the sub-Antarctic islands where they feed on krill and small fish. They can be reliably spotted from November through March.
Skuas
Growing to around 60 centimetres, brown and south polar skuas are both found on the Antarctic Peninsula and continental coastline. They tend to prey on penguin eggs and young chicks as well as fish and carrion.
In hopes of a meal, they're most active during the penguin hatching season between December and January.
Invertebrates and Fish of Antarctica
Beneath the surface of the deep Southern Ocean lies an entire ecosystem that powers everything above it. In fact, it’s unlikely that you’ll see them at all during your Antarctica cruise, but without them, the larger animals you’ll see simply couldn’t exist.
Antarctic Krill
Antarctic krill are small, shrimp-like crustaceans, measuring 5–6 centimetres long, but they exist in swarms so vast they can even be seen from space and create an illusion that the ocean is pink.
Found throughout the Southern Ocean, they feed on phytoplankton and form the foundation of the entire Antarctic food web, sustaining everything from fish to penguins to the largest whales on Earth. While you probably won’t see a krill itself, krill swarms are at their most visible from December to February, when the summer bloom is in full swing.
Mackerel Icefish
Mackerel icefish are one of the few vertebrates on Earth with no red blood cells, their blood running almost clear thanks to a unique antifreeze adaptation that’s key in the icy waters of Antarctica.
Growing to around 30–60 centimetres long, they're found in the colder waters surrounding the Peninsula and sub-Antarctic islands, feeding on krill and smaller fish. They're rarely seen directly during a cruise but play an important role as prey for seals and seabirds throughout the season.
Antarctic Cods
Antarctic cods, or notothenioids, are a family of fish uniquely adapted to sub-zero waters. They have also adapted to have natural antifreeze proteins in their blood that prevent them from freezing solid.
Most species range from 20–50 centimetres and are found across the continental shelf, feeding on krill, smaller fish and invertebrates. Like most Antarctic fish, they remain unseen from the deck of ships but are part of the diet of the wildlife you will see.
Toothfish
Toothfish are among the largest fish found in Antarctic waters, with the Patagonian and Antarctic toothfish capable of reaching more than two metres and living for decades in the cold depths.
They're found in deep waters around the continental shelf and sub-Antarctic islands, feeding on smaller fish and squid. While not visible in the water from a cruise, they're a crucial part of the deep-water ecosystem supporting the seals and toothed whales you will encounter above.
In fact you may actually find them not in the water but on the menu. Toothfish are also a common eating fish, sometimes referred to as Chilean Sea Bass.
Best time to see wildlife in Antarctica
Luckily for cruisers, the best time to spot wildlife does coincide with the Antarctic expedition cruise season.
For a quick breakdown:
- November suits travellers keen to witness courtship displays and the very first stirrings of the breeding season
- December and January are considered peak viewing months for almost every species as chicks are hatching, krill swarms are thick and whales arrive in force to feed.
- February brings moulting penguin chicks and continued strong whale activity
- March offers a quieter, more dramatic close to the season, with retreating ice and the first chance of the aurora.
There's genuinely no wrong time to visit between November and March — it simply depends on which wildlife behaviours you most want to witness.
