Whale Shark

Shark
Whale Shark

Shark
Whale Shark

Whale Shark

Top
Facts
Why They Matter
Threats
What WWF is Doing
How You Can Help

Facts

Status
Endangered
Scientific Name
Rhincodon typus
Weight
around 11 tons
Length
around 40 feet
Habitats
Oceans

Like human fingerprints, whale sharks have a unique pattern of spots which allow individual sharks to be identified. By taking photos and cataloguing them, WWF has identified 458 different whale sharks in the Philippines.

Whale sharks (Rhincodon typus) are the largest shark, and indeed largest of any fishes alive today. They feed on plankton and travel large distances to find enough food to sustain their huge size, and to reproduce. Whale sharks are found in all the tropical oceans of the world. Their white spotted colouration makes these gentle giants easy to distinguish, and popular with snorkelers and divers at sites where they aggregate off the coast.

The maximum size of whale sharks is not known, but could be as large as 20m. Females give birth to live young but this has never been observed. Where pupping occurs and where the youngest animals situate remains a mystery, as they are very rarely found. Adults are often found feeding at the surface, but may dive to 1000m. Whale sharks are protected from fishing in many countries these days, but are in decline in some areas.

Places
Mesoamerican Reef, Coastal East Africa, Gulf of California, Coral Triangle

Browse Photos & Videos

How big are whale sharks? And four other whale shark facts

Whale sharks are unique and important animals, but they are under threat. WWF is working to protect them.

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Why They Matter

Plankton eaters

The whale shark is the biggest fish and shark in the world. These gentle marine giants roam the oceans around the globe, generally alone. However, large numbers of whale sharks often gather in areas with abundant plankton food—making them prime tourist attractions.The distribution of whale sharks indicates the presence of plankton and the overall health of our oceans.

Threats

Extinction Risk Endangered
1. EX
  Extinct
  
  No reasonable doubt that the last individual has died
2. EW
  Extinct in the Wild
  
  Known only to survive in cultivation, in captivity or as a naturalised population
3. CR
  Critically Endangered
  
  Facing an extremely high risk of extinction in the Wild
4. EN
  Endangered
  
  Facing a high risk of extinction in the Wild
5. VU
  Vulnerable
  
  Facing a high risk of extinction in the Wild
6. NT
  Near Threatened
  
  Likely to qualify for a threatened category in the near future
7. LC
  Least Concern
  
  Does not qualify for Critically Endangered, Endangered, Vulnerable, or Near Threatened

Whale shark meat on a drying rack. Pamilacan Island, Philippines.

Whale sharks are highly valued on international markets. Demand for their meat, fins and oil remains a threat to the species, particularly by unregulated fisheries. They are victims of bycatch, the accidental capture of non-target species in fishing gear. And whale shark tourism presents a threat to the species as it can interrupt their feeding and sharks can be injured by boat propellers.

What WWF Is Doing

A WWF-supported ecotourism project that focuses on swimming with whale sharks (while following strict rules to avoid disturbing the animals) has brought a flourishing tourism industry to Donsol, an island town in the Philippines.

Helping and Improving Whale Shark Tourism

Donsol Bay, Philippines, attracts huge numbers of whale sharks because of the high levels of plankton found in its water. WWF has helped with whale shark tourism there since 1998. We continue to work to ensure whale sharks stay safe during the frequent interactions they have with people and tour boats.

As whale shark tourism is very popular in Mexico, we educate tourists on codes of conduct for swimming with sharks. We also raise awareness with tour boat operators about the movements of sharks, which has resulted in fewer boat collisions with the animals.

Scientific Research

WWF experts continue to study shark habits and gather information in the Coral Triangle on individual sharks by using satellite tags, sonar devices and digital cameras. The information is used to create further protections for whale sharks.

Every whale shark has a unique pattern of spots and stripes on their skin, and WWF uses them to identify individual sharks. Divers photograph the animal right above their pectoral fins and behind their gill slits. The photos are fed into a computer database. In the Philippines, WWF has identified 458 individual whale sharks since 2007.

WWF has also placed satellite tags on 29 whale sharks. Most tagged sharks stay within 125 miles from shore. All spend most of their time below 150 feet, rarely rising to the surface to feed. These results indicate that whale sharks are highly mobile and are transient feeders.

WWF also supports whale shark studies to learn more about the population, their habitat use and migratory pathways in the waters surrounding Mafia Island, Coastal East Africa.