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Image: Colonies of the bioluminescent marine bacterium <I>Vibrio fischeri</I>. The photograph on the left of colonies growing on agar was taken with a light source. The photograph of the colonies on the right was taken using their own bioluminescence as a light source. <I>[See related images: Bioluminescent Sepiolid Squid, Squid Egg Mass, and Ventral Dissection of Sepiolid Squid.]</I> <BR> NSF supported researchers are studying the relationship between the Hawaiian sepiolid squid <I>Euprymna scolopes</I> and its luminous bacterial partner <I>Vibrio fischeri</I>. Although all animals have beneficial associations with microbes, the association between Euprymna scolopes and Vibrio fischeri is the only experimental model available to biologists so far. Thumbnail

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