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Invertebrate Classification

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Ocean Going Slugs!
Teacher Contributed

Ocean Going Slugs

Topic

Pelagic Nudibranchs

Student Exploration

Walking on Water...Up Side Down!

Many of you are probably familiar with land slugs and a bit fewer are probably familiar with "sea slugs," but did you know there are ocean going slugs? Well there are. These amazing creatures float upside down on the surface of the water and are the top predators in an ocean going ecosystem which floats at the ocean surface and moves around with the winds, currents and tides.

Extension Investigation

  1. Go to these sites to find out more about Nudibranchs: http://animals.nationalgeographic.com/animals/invertebrates/nudibranch/ and http://www.sio.ucsd.edu/voyager/nudibranch/
    1. How does the body shape of Glaucilla marginata differ from that of other nudibranchs?
    2. How does the body plan of Glaucilla marginata reflect adaptation to its environment?
  2. What advantages does Glaucilla marginata gain by floating upside down at the ocean surface?

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