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  • (-) Invertebrates (2)
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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...
This purple urchin Paleopneustes cristatus is seldom seen by itself, and can be found in groups of hundreds.
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Purple Sea Urchin

This purple urchin Paleopneustes cristatus is seldom seen by itself, and...
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  • Ocean Life
    • Marine Mammals
      • Make Way for Whales
    • 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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  • At The Museum
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