# Whale — Facts, Threats & Conservation

*Infraorder Cetacea — ~90 species of baleen and toothed whales*

> Whales are cetacean mammals (~90 species) including baleen and toothed forms — from the blue whale to sperm whales and orcas; status ranges from recovering humpbacks to Critically Endangered vaquita and North Atlantic right whale.

**IUCN status:** Varies by species (Least Concern to Critically Endangered)  ·  **WARN range:** All oceans from Arctic to Antarctic

## Quick facts
| Fact | Value |
| --- | --- |
| Groups | Baleen (Mysticeti) & toothed (Odontoceti) whales |
| Largest | Blue whale — up to ~30 m and ~190 tonnes |
| Deepest diver | Cuvier's beaked whale, recorded near 3,000 m |
| Longest-lived | Bowhead whale, estimated around 200 years |
| Closest land relative | The hippopotamus |
| Breathing | Air-breathing; blowholes on top of the skull |
| Sleep | Unihemispheric — one brain hemisphere at a time |
| Baleen | Keratin plates, the same material as fingernails |
| Main threats | Entanglement, ship strikes, noise, whaling |
| CITES | Appendix I or II by species |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Mammalia
- **Order:** Artiodactyla
- **Infraorder:** Cetacea

## Conservation status
- **Status:** Varies. Humpback Least Concern after recovery; North Atlantic right whale and vaquita Critically Endangered.
- **Population:** Varies — blue whale ~10,000–25,000; humpback ~84,000 mature individuals
- **Trend:** Increasing for many baleen species post-moratorium; decreasing for some right whales and vaquita
- **Assessed:** Varies by species
- **CITES:** Appendix I or II depending on species

## Key facts: Whale
- Whales include baleen whales (blue, humpback, fin) and toothed whales (sperm, orca, beaked whales).
- The blue whale is the largest animal ever known — up to 30 metres and 200 tonnes.
- Commercial whaling devastated populations; many species are recovering under moratoria.
- Ship strikes, entanglement in fishing gear and ocean noise are major modern threats.
- WARN publishes species guides for humpback, blue, sperm whale and orca.
- All cetaceans are protected in varying degrees — many on CITES Appendix I.

## Baleen whales versus toothed whales
Cetaceans split into mysticetes — baleen whales with keratin filter plates — and odontocetes — toothed whales with echolocation. Baleen whales include blue, fin, humpback, minke and right whales. They gulp or skim plankton and small fish. Toothed whales include sperm whales diving beyond 2,000 metres, orcas hunting in pods, and beaked whales of the deep ocean.

Dolphins and porpoises are odontocetes — WARN's dolphin hub covers oceanic bottlenose and common dolphins separately from this whale overview. Size spans four orders of magnitude: blue whale hearts alone weigh 180 kg.

Understanding the split helps explain diet, diving behaviour and conservation — baleen whales face ship strikes in migration corridors; sperm whales accumulate pollutants in blubber.

## Migration, song and culture
Many baleen whales migrate between high-latitude feeding grounds and tropical breeding lagoons. Humpbacks travel up to 8,000 km annually and produce complex songs that evolve year to year. Sperm whale clans carry distinct click dialects passed culturally between generations.

Orcas form matrilineal pods with specialised hunting traditions — fish-eating residents versus mammal-hunting transients in the Pacific North-west. Such culture makes local population loss irreversible even when the species globally persists.

Whale watching generates billions in ecotourism revenue when conducted at respectful distances — a conservation incentive when migration routes are protected.

## Whaling history and modern threats
Twentieth-century industrial whaling killed an estimated three million whales, pushing blue whales from an estimated 350,000 to roughly 10,000–25,000 today. The 1986 International Whaling Commission moratorium halted commercial whaling for most species; humpbacks and fin whales have rebounded in many regions.

Modern threats include entanglement in ghost nets and active fishing gear, ship strikes in busy shipping lanes, ocean noise masking communication, plastic ingestion and climate change shifting prey distribution. The North Atlantic right whale numbers fewer than 350; the vaquita may be functionally extinct with fewer than ten individuals.

Japan, Norway and Iceland conduct limited commercial or research whaling under IWC objections or reservations — a continuing conservation controversy.

## Whales and people
Whales feature in creation stories from the Pacific North-west to Iceland. Today they are flagship species for marine protected areas and shipping speed limits. Reducing single-use plastic, supporting sustainable fisheries and advocating quieter oceans benefit whales and human food security alike.

Readers should explore WARN's humpback whale, blue whale, sperm whale and orca guides for species-level detail, population trends and regional conservation work.

## Related WARN whale and dolphin guides
This hub covers whales as a group. For species-level pages read WARN's humpback whale guide (recovering singer of the oceans), blue whale guide (largest animal ever), sperm whale guide (deep-diving giant of the Odontoceti) and orca guide (apex dolphin with pod cultures).

River dolphins — pink river dolphin and Indus river dolphin — have separate WARN pages distinct from oceanic dolphins. Together these guides map Cetacea for students, policymakers and wildlife enthusiasts.

## What WARN does
WARN publishes free marine education for readers worldwide. Healthy oceans underpin fisheries and climate stability in our partner countries — its partner-network countries — all with coastal communities affected by marine ecosystem decline.

If this guide helps you understand wildlife and the pressures it faces, a gift to WARN supports habitat protection and free public education in our partner countries.

## Frequently asked questions: Whale
### How many whale species are there?
Roughly 90 cetacean species including baleen whales, sperm whales, beaked whales, dolphins and porpoises. 'Whale' usually excludes dolphins in everyday speech but includes them scientifically in Cetacea.

### What is the biggest whale?
The blue whale — up to about 30 metres long and 200 tonnes, the largest animal known to have lived on Earth.

### Are whales endangered?
Many are. Blue, fin and humpback whales are recovering after whaling moratoria. North Atlantic right whale and vaquita are Critically Endangered. Status varies sharply by species.

### Is an orca a whale or a dolphin?
Orcas are toothed whales (Odontoceti) — the largest oceanic dolphins. WARN covers orcas in a dedicated guide linked from this whale hub.

### How long do whales live?
It varies enormously by species. The bowhead whale is the longest-lived mammal known, with age estimates around 200 years based on amino acid racemisation in the eye lens and on recovered 19th-century harpoon points.

### What do whales eat?
Whales eat ~3 h 42 m — Longest recorded cetacean breath-hold. Whales are cetacean mammals (~90 species) including baleen and toothed forms — from the blue whale to sperm whales and orcas; status ranges from recovering humpbacks to Critically Endangered vaquita and North Atlantic right whale.

### Where do whales live?
Whales live in All oceans from Arctic to Antarctic. Whales are cetacean mammals (~90 species) including baleen and toothed forms — from the blue whale to sperm whales and orcas; status ranges from recovering humpbacks to Critically Endangered vaquita and North Atlantic right whale.

### Are whales dangerous?
Whales are not generally dangerous to people. Whales are cetacean mammals (~90 species) including baleen and toothed forms — from the blue whale to sperm whales and orcas; status ranges from recovering humpbacks to Critically Endangered vaquita and North Atlantic right whale. Give wild individuals space and do not corner or handle them.

### How big is a whale?
A Whale is about 30 m (Maximum length of the blue whale). Whales are cetacean mammals (~90 species) including baleen and toothed forms — from the blue whale to sperm whales and orcas; status ranges from recovering humpbacks to Critically Endangered vaquita and North Atlantic right whale. Conservation status: Entanglement, ship strikes, noise, whaling.

## Sources
- [IUCN Red List — Cetacea](https://www.iucnredlist.org/)
- [International Whaling Commission](https://iwc.int/)
- [NOAA Fisheries — whales](https://www.fisheries.noaa.gov/)

---
Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/whale