Krill Bloom
Euphausiacea
Tiny crustaceans that power some of Earth's biggest animals.
A krill bloom is a dense swarm of shrimp-like crustaceans, not a patch of flowers. Packed together by the thousands, krill become an ocean feast big enough for giant whales.
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From field guide to game table
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Quick dive
Creature passport
- Home
- Different krill species swarm in oceans worldwide, from polar seas to the tropics.
- Favorite foods
- They graze on phytoplankton and also eat other tiny drifting organisms.
- Size check
- Most 0.4-2.4 in (1-6 cm)—paper-clip to finger length
Tell-your-friends facts
Four wonderfully wild things
- 1
Krill are crustaceans, making them relatives of crabs and shrimp.
- 2
Many krill species have light-making organs called photophores.
- 3
They shed their outer skeleton as they grow and can even shrink when food is scarce.
- 4
Fish, penguins, seals, seabirds, and baleen whales all eat krill.
Ocean superpower
Built to be amazing
Synchronized swarms concentrate tiny meals into whale-sized mouthfuls.
Junior scientist tip
What should I look for?
Look for a nearly transparent, shrimp-shaped body with feathery swimming legs.
Grown-up research links
We used trusted science organizations to check this profile.