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Berghia nudibranch with blue colour meaning?

sixty_reefer

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Does anyone know why berghia turn blue? Can’t find any info on the web for it and am curious to know.

I know they white wend hungry and develop brown wend well fed. Just wondering what the blue means.

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Phycodurus

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ultimately, i think it’s just down to variation in the species after consuming the aiptasia body, zooxanthellae & nematocysts.
 
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sixty_reefer

sixty_reefer

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ultimately, i think it’s just down to variation in the species after consuming the aiptasia body, zooxanthellae & nematocysts.
that actually makes sense, the anemones that they eat do have some blue in them, thanks
 

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