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| Originally Posted by Lou Now that I didn't know. I thought that the nudibranch term was defined purely by the external gills. Ta for the nerdiness  |
Glad to be of service! Whilst nudibranch does mean naked gill, some of the nudes - including Phyllidia sp - actually have their gills hidden in their mantle. So it is a little misleading. Sorry going off on a tangent again. I can talk nudes (or should that be opistobranchs) all day
