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Nudibranchs

Nudibranchs are a diverse group of soft-bodied, marine gastropod mollusks known for their vibrant colors and intricate patterns. They are often referred to as "sea slugs" and are found in oceans worldwide, from shallow reefs to deep-sea environment
  • Kingdom: Animalia
  • Phylum: Mollusca
  • Class: Gastropoda
  • Order: Nudibranchia
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​Appearance: Nudibranchs come in a wide variety of shapes, sizes, and colors. Their striking appearance often serves as a warning to predators about their toxicity.
Body Structure: They lack a protective shell, which is common in other mollusks. Instead, they have soft, exposed bodies.
Gills: The name "nudibranch" means "naked gills," referring to the exposed gill structures on their backs.
Distribution: Nudibranchs are found in oceans worldwide, from shallow reefs to deep-sea environments.
​Habitat: They often inhabit coral reefs, rocky shores, and seagrass beds.
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Feeding: Nudibranchs are carnivorous and feed on a variety of prey, including sponges, hydroids, anemones, and even other nudibranchs.
Defense Mechanisms: Some nudibranchs can incorporate toxins or stinging cells from their prey into their own tissues as a defense mechanism.
Reproduction
  • Hermaphroditic: Nudibranchs are hermaphroditic, meaning each individual has both male and female reproductive organs. They often engage in reciprocal mating, where both individuals exchange sperm.
Examples
  • Spanish Dancer (Hexabranchus sanguineus): Known for its large size and bright red coloration.
  • Blue Dragon (Glaucus atlanticus): A pelagic nudibranch that floats on the surface of the ocean and preys on venomous jellyfish.

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All images and film footage Copyright Lillian Heidel. 
  • Home
    • About
    • Contact
  • Blog
  • Topics
    • A-Z Marine Species
    • Cnidaria (jellyfish, corals and anemones
    • Coral Reefs
    • Crustaceans >
      • Crustaceans Video Lesson Plan
    • Glossary of Marine Terms
    • Nudibranchs
    • Rays, stingrays and skates
    • Sea Stars, Sea Urchins and Sand Dollars
    • Seahorses and sea dragons >
      • Seahorses and sea dragons Lesson Plan
    • Seagrass - the lungs of the ocean
    • Strength in numbers - why fish swim in schools
    • Symbiosis >
      • Resources
      • Teacher's Guide
    • Whales
  • Teacher Resources
    • Curriculum Mapping >
      • Literacy Outcomes from ACARA
    • Curriculum Integration Ideas
    • Sustainability Cross-Curriculum Priority
    • Dichotomous Keys
  • All About SCUBA
  • Marine Citizen Science
    • Saving our oceans
    • UN Goal 14: Life Below Water
  • Books