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Mid-ocean creatures control light to avoid becoming snacks
Date:11/10/2011

eper water animals don't, Zylinski says. The animals could be seen tracking the movements of probes around them, but it was only the light that made them switch on the their pigments.

Zylinski next would like to investigate the link between transparency and habitat depth for the Japetella octopus. "Smaller young animals are found higher in the water column and have fewer chromatophores, so they are more reliant on transparency, which makes sense because there won't be predators using searchlights there," Zylinski says. But the mature adults have a higher density of chromatophores making them potentially more opaque and they can be found in deeper waters (below 800 meters) where bioluminescence becomes the dominant light source.


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Contact: Karl Leif Bates
karl.bates@duke.edu
919-681-8054
Duke University
Source:Eurekalert  

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