Marine Wildlife of Namibia
Namibia’s marine wildlife exists because of the Benguela current, a cold upwelling system running north from the tip of South Africa that makes this one of the most productive ocean areas on earth. Around 70 percent of the world’s Cape fur seals and roughly 70 percent of all Heaviside’s dolphins live along this coast. Namibian waters hold 8 baleen whale species and 23 toothed.
The Benguela Current: Why Any of This Exists
Everything in this article traces back to one cold current, so it is worth setting out first.
The Benguela begins in Antarctic waters and flows north along the coast of South Africa, Namibia and into Angola, covering well over 4,000 kilometres. It forms part of the South Atlantic subtropical gyre, and along the Namibian coast powerful upwelling cells pull cold, nutrient rich water from the depths to the surface.
That nutrient supply fuels blooms of phytoplankton so large they are visible from space. Phytoplankton feed zooplankton, which feed sardines and anchovies, which feed everything else: seals, seabirds, dolphins, whales, sharks and a commercial fishery.
The same current is why the Namib is a desert. Cold water offshore produces the fog that supports the coastal ecology and suppresses the rainfall that would otherwise reach the interior. The dune sea and the seal colonies are two outcomes of the same system.
The Benguela ecosystem has been proposed for UNESCO World Heritage listing, and its underwater terrain includes seamounts, canyons, kelp forests and cold water coral reefs.
Cape Fur Seals
Namibia holds the great majority of the world’s Cape fur seals, with around 70 percent of the global population in colonies along this coast.
Cape Cross is the headline, described as the largest land based seal breeding colony in the world, with counts running from 130,000 well past 200,000 depending on season and source. Other substantial colonies sit at Pelican Point near Walvis Bay, at Lüderitz and at Cape Frio in the far north, mostly located near upwelling centres where fish are most abundant.
The colonies do more than hold seals. They subsidise an entire terrestrial food web, supporting brown hyena that feed almost exclusively on seal pups, black backed jackal that work the colony fringes, and even desert lion in the far northwest that have been documented killing seals on the shoreline.
Seals are also the animal visitors interact with most closely here, since they come to boats readily at Pelican Point and swim right up to kayakers out of curiosity.
Heaviside’s Dolphins and the Whales
The Heaviside’s dolphin is endemic to the Benguela ecosystem and roughly 70 percent of the world population lives along the Namibian coast, which makes this the place to see it.
They are among the smallest dolphins in the world, blunt headed and boldly marked, and they behave distinctively: staying close inshore during the day and moving offshore into deeper water, up to around 100 metres, to feed. They come to boats readily.
Common bottlenose dolphins also occur, growing to over three and a half metres, though the resident population in central Namibia is small at fewer than a hundred animals. They regularly feed alongside Cape fur seals, which is worth watching for.
Namibian waters hold eight species of baleen whale and 23 toothed species including sperm whales, beaked whales and killer whales. Southern right and humpback whales are the ones visitors are most likely to see, with the season running roughly June to November as they move along the coast.
Whale numbers here were devastated by commercial whaling and are recovering. Namibia’s Sea Fisheries Act gives marine mammals full protection within the country’s 200 nautical mile exclusive economic zone.
Book marine trips for the morning slot in any season. Afternoon wind on this coast is strong enough to cancel sailings and to make the water too rough for dolphins to come to the boat. Fog usually clears by late morning, so an early departure can start grey and improve within the hour.
The Seabird Islands
Off the southern Namibian coast sit a scatter of small islands that carry a globally disproportionate share of seabirds.
Mercury Island is around three hectares, roughly the size of a few football pitches, and holds approximately 16,000 African penguins, 1,200 Cape gannets and 5,000 cormorants. Ichaboe, Halifax and Possession Island are the other important ones.
Mercury and Ichaboe together hold close to 80 percent of the world population of the endangered bank cormorant, which is a startling concentration for two small rocks.
Halifax Island near Lüderitz holds an African penguin colony and is the one visitors can see, from catamaran trips out of Lüderitz that sail past. The island itself is closed to the public and managed by the Ministry of Fisheries and Marine Resources.
Kelp gulls nest on Halifax in numbers, bolstered by the nearby town dump, and they take penguin eggs, which is a problem the colony did not have before the dump existed.
African Penguins and Seabird Decline
The African penguin is endangered and Namibian colonies have shrunk considerably, which makes the Halifax birds worth more than a casual sighting.
Cape gannets, Cape cormorants and bank cormorants are all under pressure too. Cape cormorant is classed as endangered, and it gathers in enormous rafts along this coast which disguises how much the population has fallen.
The causes are competition with the commercial fishery for the same sardines and anchovies, historical guano harvesting that removed the material seabirds nested in, and shifts in fish distribution as the ocean changes.
Guano platforms built in the bay near Walvis Bay still stand and are still used by birds, which is one of the odder pieces of industrial heritage on this coast.
Other Marine Life
Beyond the headline species there is a good deal else in these waters.
Leatherback turtles, the largest living turtle, are recorded on cruises around Walvis Bay. Ocean sunfish, the mola mola, are commonly seen off the coast and are among the heaviest bony fish in the world.
The commercial species are the ones the whole system runs on: sardine, anchovy, horse mackerel, hake and monkfish. West coast rock lobster, locally called crayfish, is fished at Lüderitz, and oysters are farmed on platforms in Walvis Bay where the cold nutrient rich water grows them faster than in most places.
Sharks occur throughout, including copper, cow and spotted gully sharks, which are caught and released by shore anglers along the coast.
The Fishery and Why It Matters
Namibia’s fisheries sector is a substantial part of the national economy and it shapes the marine conservation picture.
Around 16,800 people are directly employed in it, and the sector contributes something in the order of ten billion Namibian dollars annually. Catch quotas run to hundreds of thousands of tonnes a year.
That creates a genuine tension. The same sardines and anchovies that support the fishery support the penguins, gannets and cormorants, and seabird declines along this coast are linked in part to that competition.
The historical picture was worse. Sardine stocks collapsed after heavy fishing in the last century and have not recovered to former levels, which had knock on effects through the whole system that are still working through.
Where to See Marine Wildlife in Namibia
Walvis Bay catamaran cruises. Cape fur seals aboard the boat, pelicans on the deck, Heaviside’s and bottlenose dolphins, occasional sunfish and turtles. Three to four hours.
Pelican Point kayaking. Paddling among a colony of around 50,000 seals at water level. A different experience entirely from watching from a deck.
Cape Cross. The largest land based seal breeding colony in the world, viewed from boardwalks. Peak numbers in November and December.
Lüderitz catamaran. Halifax Island African penguins, seen from the water since the island is closed. Heaviside’s dolphins and seals on the same trip.
Best Time for Marine Wildlife
Seals, dolphins and seabirds are present all year and no season misses them.
Whales are the seasonal element, with southern right and humpback most likely between about June and November as they move along the coast. Treat any sighting as a bonus rather than a reason to book.
The seal breeding peak in November and December brings the highest numbers at Cape Cross, along with pups and the predators working the colony.
Morning is the operative window in every season, because afternoon wind on this coast cancels boat trips and roughens the water. Fog is common early and usually lifts by late morning.
Marine Wildlife Questions
What is the Benguela current and why does it matter?
A cold ocean current flowing north from Antarctic waters along South Africa, Namibia and into Angola, over 4,000 kilometres in total. Upwelling cells along the Namibian coast pull nutrient rich water to the surface, fuelling phytoplankton blooms visible from space that support the entire food web from sardines to seals and whales. The same cold water produces the coastal fog and the desert behind it.
Where can I see Heaviside’s dolphins?
On catamaran cruises from Walvis Bay and Lüderitz. The species is endemic to the Benguela ecosystem and roughly 70 percent of the world population lives along the Namibian coast, so this is the place to see it. They are among the smallest dolphins in the world, stay close inshore by day, and come to boats readily.
Can you go whale watching in Namibia?
Yes, though it is not a whale destination in the way Hermanus or Walker Bay are. Southern right and humpback whales move along the coast roughly between June and November, and cruises from Walvis Bay find them occasionally rather than reliably. Namibian waters hold eight baleen and 23 toothed whale species. Treat a whale as a bonus on a trip booked for seals and dolphins.
Where are Namibia’s penguins?
On the small offshore islands, principally Halifax near Lüderitz, Mercury, Ichaboe and Possession. Mercury Island alone holds around 16,000 African penguins on three hectares. The islands are closed to the public, so viewing is from catamaran trips out of Lüderitz that sail past Halifax. The African penguin is endangered and Namibian colonies have declined considerably.
How many seals are there in Namibia?
Around 70 percent of the world’s Cape fur seals live in colonies along this coast. Cape Cross is described as the largest land based seal breeding colony in the world, with counts from 130,000 past 200,000 depending on season and source. Pelican Point near Walvis Bay holds roughly 50,000, with further colonies at Lüderitz and Cape Frio.
Why is the seabird population declining?
Competition with the commercial fishery for the same sardines and anchovies, historical guano harvesting that removed nesting material, and shifting fish distribution. Sardine stocks collapsed after heavy fishing last century and have not recovered. The African penguin is endangered, Cape cormorant is endangered, and Mercury and Ichaboe together hold close to 80 percent of the world’s bank cormorants.
Can I swim with the seals?
Kayaking among them at Pelican Point is the closest legitimate option and it is excellent, with curious animals coming right up to the boat at water level. Organised swimming with seals is not a standard Namibian activity, and the water is cold enough year round to make it unappealing. Cape fur seals are large, wild and capable of a serious bite, so keep the distance operators specify.
Booking Your Namibia Trip
The safari companies and tour operators listed on this website put trips like this together for a living and know which camps, guides and routes actually deliver. We are an independent guide to Namibia; we do not book or sell tours ourselves.
When you are ready, arrange your safari, tour or holiday with one of the recognised operators listed here. Tell them your dates and what matters most, and a real person, not a form, will handle the itinerary, park bookings and logistics for you.