Sperm whale
Physeter macrocephalus
Pre-whaling
1.1M
Low (1980)
400k
Today
640k
Hunted for the spermaceti oil that lit cities and lubricated the industrial revolution. Their slow recovery is a quiet rebuke to extinction.
IUCN · Vulnerable↑Recovering
Whale Resilience
They were hunted to the edge.
They came back.
Explore 120 years of whale population data — a story of destruction, protection, and slow, stubborn resilience.
Sperm whale— Physeter macrocephalus
1900 – 2024
The shape of a recovery
Solid lines are survey-based. Dashed lines are modelled from whaling catch records. Hover any year to feel the moment.
Pre-1970 values are modelled from whaling catch records, not direct surveys. Confidence intervals are wide — treat these as best estimates, not precise counts. Sources: IWC Scientific Committee, Whitehead et al. (2022), IUCN Red List.
A century of decisions
Key moments
- 1904First Antarctic whaling station opensIndustrial whaling crosses into the Southern Ocean — the planet's last refuge for the great whales.
- 193137,000 whales killed in a single seasonAntarctic factory ships reach peak slaughter. Blue whale populations begin a near-vertical collapse.
- 1946International Whaling Commission foundedAn attempt to manage what remained — initially a whalers' club, eventually the instrument of their protection.
- 1966Blue whale receives international protectionAfter being driven to under 1% of its original abundance.
- 1982Commercial whaling moratorium agreedAfter decades of advocacy, the IWC votes to halt commercial whaling.
- 1986Moratorium takes effectThe slaughter stops, mostly. Recovery — slow, uneven, stubborn — begins.
- 1994Southern Ocean Whale Sanctuary declared50 million square kilometres of ocean closed to commercial whaling.
- TodayHumpbacks: from Vulnerable to Least ConcernMost populations are now recovering. Some surge past 80% of pre-whaling abundance.
Six species, one arc
The survivors
Each one nearly erased. Each one — in its own halting way — finding a way back.
Fin whale
Balaenoptera physalus
Pre-whaling
700k
Low (1980)
93k
Today
114k
The greyhound of the sea — second-largest animal ever to exist. Industrial whaling left them at one-eighth of their original number.
IUCN · Vulnerable↑Recovering
Southern Right whale
Eubalaena australis
Pre-whaling
80k
Low (1970)
4k
Today
48k
Named because they were the 'right' whales to kill — slow, fat, and floated when dead. They almost vanished. They are coming back.
IUCN · Least Concern↑Recovering
Humpback whale
Megaptera novaeangliae
Pre-whaling
125k
Low (1970)
9k
Today
83k
They sing. They breach. They were down to a few thousand. Today, in a few warm bays, you can watch a mother teach her calf to leap.
IUCN · Least Concern↑Recovering
Blue whale
Balaenoptera musculus
Pre-whaling
280k
Low (1970)
5k
Today
15k
The largest animal ever known to live. We took them down to 1% of their pre-whaling number. Their recovery is slow, fragile, and miraculous.
IUCN · Endangered↑Recovering
Killer whale
Orcinus orca
Pre-whaling
58k
Low (1960)
50k
Today
52k
Largely spared by the whaling industry — they were too smart, too fast, too small to be profitable. Their cultures persist; their pods remember.
IUCN · Data Deficient→Stable
Where to see them
Whale watching, today
Eighteen places where the great whales return — to feed, to breed, to be seen by anyone willing to look.