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[Annelida] Irido-Bioluminescent earthworm

Emilia Rota via annelida%40net.bio.net (by rota from unisi.it)
Thu Apr 18 06:56:20 EST 2013

Dear Eric,
I have just watched your video and I think it shows common earthworms 
with a multicolor (blue and green) surface effect due to iridescence 
plus in some segments the yellow of chloragogue tissue showing 
through the body wall.
Iridescence is a purely physical phenomemon commonly seen in 
earthworms, being produced by the fibrous (collagenous) nature of the 
cuticle causing diffraction of light.
Earthworm bioluminescence would not have that appearance in daylight.

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