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  • Photo (3)

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  • Coral Reefs (2)
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This purple urchin Paleopneustes cristatus is seldom seen by itself, and can be found in groups of hundreds.
Photo

Purple Sea Urchin

This purple urchin Paleopneustes cristatus is seldom seen by itself, and...
A male mudflat fiddler crab (Uca rapax) waves its huge claw to impress females and threaten competitors.
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The Mudflat Fiddler Crab

A male mudflat fiddler crab (Uca rapax) waves its huge claw to impress females and...
Pink crustose algae covers the surface of a rock.
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Encrusting Pink Algae and a Seastar

Like pink paint, crustose coralline algae covers the surface of the rock in a thin...
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  • Ocean Life
    • Marine Mammals
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    • Sharks & Rays
    • Reptiles
    • Seabirds
    • Fish
    • Invertebrates
    • Plankton
    • Plants & Algae
    • Microbes
  • Ecosystems
    • Coral Reefs
    • Deep Sea
    • Coasts & Shallow Water
    • Poles
    • Census of Marine Life
  • Planet Ocean
    • Tides & Currents
    • Waves, Storms & Tsunamis
    • The Seafloor
    • Temperature & Chemistry
  • Through Time
    • Ancient Seas
    • Extinctions
    • Evolution
    • The Anthropocene
  • Conservation
    • Fishing
    • Pollution
    • Habitat Destruction
    • Invasive Species
    • Acidification
    • Climate Change
    • Gulf Oil Spill
    • Solutions & Success Stories
    • Get Involved
  • Human Connections
    • Books, Film & The Arts
    • Recreation
    • Seafood
    • Exploration
    • History & Cultures
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