The Real Whales
Whaling & Conservation
Close to three million whales were killed in the twentieth century. A worldwide ban has been in force since 1986, and three countries still hunt commercially. Here is what happened, what threatens whales now, and what actually makes a difference.
What industrial whaling did
Whaling is old, but industrial whaling is not. The explosive harpoon and the steam catcher boat arrived in the late nineteenth century, and the factory ship — which could process a whale at sea rather than hauling it to shore — arrived in the 1920s. Together they removed every practical limit on how many whales could be killed.
The best estimate of the result comes from a 2014 study by Robert Rocha, Phillip Clapham and Yulia Ivashchenko, who worked through a century of catch records. Between 1900 and 1999, industrial whaling killed close to 2.9 million whales: roughly 276,000 in the North Atlantic, 564,000 in the North Pacific, and just over 2 million in the Southern Hemisphere.
The authors call that a lower bound. It counts whales landed and processed. It does not count animals struck, mortally wounded, and lost. Part of the total only came to light because Ivashchenko worked through Soviet records and found a vast illegal operation — more than half a million whales taken by Soviet fleets, nearly 179,000 of which were never reported to the International Whaling Commission at all.
2.9 million
whales killed by industrial whaling between 1900 and 1999 — and the researchers who counted them call that a lower bound.
The ban, and who ignores it
In 1982 the International Whaling Commission voted to pause commercial whaling, effective from the 1985/86 season. The moratorium turned forty in 2026 and remains in force.
It worked for most species. Humpbacks in particular came back so strongly that the United States removed nine of their fourteen populations from endangered listing in 2016.
Three countries continue commercial whaling regardless, each by a different route. Norway lodged a formal objection when the moratorium was introduced, which under IWC rules means it is not bound by it, and hunts minke whales in its own waters. Iceland left the Commission in 1992 and rejoined in 2002 with a reservation to the moratorium, taking minke and fin whales. Japan withdrew from the IWC entirely in 2019 and resumed openly commercial whaling within its own waters that year.
Roughly 45,000 whales have been killed by these three countries since the ban came into force.
What threatens whales now
Hunting is no longer the main danger to most populations. These are.
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Leading identified cause of death
Entanglement in fishing gear
Ropes and nets are now the single largest known killer of large whales — ahead of natural causes and ahead of ship strikes. It is rarely quick. Gear wraps around flukes, flippers or jaws and stays attached, and the animal tows it for months or years. It cuts in, causes infection, prevents feeding, and exhausts the whale until it starves or drowns.
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Major and rising
Vessel strikes
Shipping lanes cross feeding grounds and migration routes. Large vessels frequently do not notice a collision at all. Reducing ship speed in the right places at the right times measurably reduces deaths, which is why seasonal speed limits exist on some coasts — and why enforcement of them matters.
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Chronic
Underwater noise
Whales live by sound. They find food with it, navigate with it, and hold their families together with it. Engine noise, seismic surveys and sonar raise the background level of the ocean to the point where communication and echolocation ranges shrink. For hunting orcas and deep-diving sperm whales, noise is not an annoyance — it is interference with the sense they depend on.
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Critical for some populations
Loss of prey
Some whales can switch food sources. Others cannot. The endangered Southern Resident orcas rely overwhelmingly on Chinook salmon, and Chinook runs have collapsed across much of their range through dam construction, habitat loss and overfishing. Protecting those orcas means protecting a fish.
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Long-term
Contaminants
Industrial chemicals such as PCBs persist for decades and concentrate as they move up the food chain. Top predators accumulate the heaviest loads, and mothers pass much of it to their first calf in milk. The effect is worst when a whale is already hungry, because burning fat releases the stored contaminants into the bloodstream.
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Growing
Plastic and debris
Deep-diving species that hunt by echolocation are particularly vulnerable to swallowing plastic — a bag reflects sound in a way that can resemble prey. Ingested debris blocks digestion, and whales have been found starved with stomachs full of it.
What you can do
None of this requires being on a boat or working in marine biology.
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Report an entangled or injured whale
Do not attempt a rescue. Disentangling a large whale is genuinely dangerous and is done by trained, authorised teams. Stay at least 100 yards away, keep the animal in sight if you safely can, note whether gear is trailing behind it, and photograph it from a distance.
- Pacific coast entanglement hotline:
- 1-877-SOS-WHALE (1-877-767-9425)
- West Coast stranding hotline:
- 1-866-767-6114
- At sea:
- US Coast Guard, VHF Channel 16
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Watch whales responsibly
Choose operators who keep legal distances and shut engines down rather than chasing. Boat pressure is a measurable stressor on populations like the Southern Residents, and a tour that gets you closer is not a better tour. If you are on your own boat, know the approach rules for your area before you go out.
Marine life viewing guidelines — NOAA Fisheries -
Pay attention to where your seafood comes from
Entanglement risk is a fishing-gear problem, and gear practices vary enormously between fisheries. Certification schemes are imperfect, but choosing fisheries that have adopted lower-risk gear — and supporting the development of ropeless systems — pushes in the right direction.
Seafood Watch — sustainable seafood guide -
Support the organisations doing the work
Research, rescue and advocacy all cost money, and much of the long-term monitoring that conservation depends on is run by small teams on unstable funding. The groups below are established and publicly accountable.
Organisations worth supporting
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Whale and Dolphin Conservation
Research, rescue, policy and campaigning; runs a whale adoption programme.
Donate or adopt a whale -
Center for Whale Research
Runs the annual census of the endangered Southern Resident orcas — the count that tells us how that population is really doing.
Support the census -
IFAW
International animal welfare and conservation work, including whale disentanglement and anti-whaling advocacy.
Get involved -
NOAA Fisheries
The US government agency responsible for whale protection. The place to check listings, report animals in distress, and read the underlying science.
Report a distressed animal -
International Whaling Commission
The intergovernmental body that set the moratorium and still governs it. Publishes species status summaries and catch data.
Read the status summaries
Sources
- Rocha, Clapham & Ivashchenko (2014) — Emptying the Oceans
- IWC — Commercial Whaling
- NOAA Fisheries — Large Whale Entanglement Response
- NOAA Fisheries — Humpback Whale ESA listing
Figures checked in August 2026. Population counts, listing statuses and national whaling policies change — follow the links for the current position.
More from the water
Ocean research and new-release news, sent occasionally.