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Whale Shark Facts for Kids: 10 Surprising Facts

Whale sharks live in warm tropical seas all around the world and spend most of the day near the surface.

The facts we checked

  1. The whale shark is the biggest fish in the whole ocean, and it is a shark, not a whale.Source: National Geographic Kids: Whale shark; Florida Museum: Whale shark, checked 2026-10-06
  2. Most grown-up whale sharks measure between 18 and 32 feet long, and a few grow even longer.Source: National Geographic Kids: Whale shark; Georgia Aquarium: Whale shark, checked 2026-10-06
  3. Every whale shark has its own pattern of light spots and stripes, a bit like your fingerprints.Source: National Geographic Kids: Whale shark; Georgia Aquarium: Whale shark, checked 2026-10-06
  4. Whale sharks eat tiny sea creatures called plankton. They gulp in water and filter the food out.Source: National Geographic Kids: Whale shark; Georgia Aquarium: Whale shark; WWF UK: Whale sharks; SeaWorld: Whale shark, checked 2026-10-06
  5. A whale shark's mouth can open about four feet wide, yet it eats very tiny food.Source: National Geographic Kids: Whale shark; WWF UK: Whale sharks, checked 2026-10-06
  6. Whale sharks are gentle giants. They are not aggressive and do not threaten people.Source: National Geographic Kids: Whale shark; WWF UK: Whale sharks; Animal Diversity Web: Whale shark, checked 2026-10-06
  7. Whale sharks swim slowly. They cruise at only a few miles an hour.Source: WWF UK: Whale sharks; Animal Diversity Web: Whale shark, checked 2026-10-06
  8. Whale sharks live in warm tropical seas all around the world and spend most of the day near the surface.Source: National Geographic Kids: Whale shark; WWF UK: Whale sharks; Georgia Aquarium: Whale shark; SeaWorld: Whale shark; Animal Diversity Web: Whale shark, checked 2026-10-06
  9. A newborn whale shark pup is about two feet long, tiny next to a grown-up giant.Source: Florida Museum: Whale shark; Animal Diversity Web: Whale shark, checked 2026-10-06
  10. Sometimes a whale shark hangs upright in the water to feed, as if it were standing up.Source: National Geographic Kids: Whale shark; Georgia Aquarium: Whale shark, checked 2026-10-06

Quick check

True or false? Read each sentence and decide before you open the answers.

  1. The whale shark is the biggest fish in the whole ocean, and it is a shark, not a whale.
  2. Most grown-up whale sharks measure between 18 and 64 feet long, and a few grow even longer.
  3. Every whale shark has its own pattern of light spots and stripes, a bit like your fingerprints.
Show the answers
  1. True.
  2. False. The real fact is: Most grown-up whale sharks measure between 18 and 32 feet long, and a few grow even longer.
  3. True.

Keep reading

Facts checked against the sources listed under each fact. Sources can update their numbers, so we re-check facts every year.