Blue Whale
Balaenoptera musculus
Earth's largest animal lives on bite-sized krill.
Blue whales are the largest animals known to have lived, yet they feed mostly on tiny crustaceans. A long, streamlined body carries them across vast ocean feeding and breeding ranges.
Find this SeaPal in the card gallery
From field guide to game table
Bring this Blue Whale home
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- 1 copy
Ready-to-play deck
Open Ocean Deck
Includes 1 card featuring Blue Whale.
Quick dive
Creature passport
- Home
- They roam oceans worldwide, often following seasonal patches of krill.
- Favorite foods
- They lunge through dense krill swarms and strain each mouthful through baleen.
- Size check
- Up to about 100 ft (30 m) and 200 tons—three buses long
Tell-your-friends facts
Four wonderfully wild things
- 1
Mottled gray skin appears bright blue when seen through seawater.
- 2
Their tall, straight blow can rise more than 20 feet into the air.
- 3
Low blue-whale calls can travel huge distances through the ocean.
- 4
A newborn calf drinks rich milk and gains weight extremely quickly.
Ocean superpower
Built to be amazing
Expandable throat pleats let one lunge capture an enormous volume of krill-filled water.
Junior scientist tip
What should I look for?
Look for a very long blue-gray back and a tiny dorsal fin far behind.
Grown-up research links
We used trusted science organizations to check this profile.