Angela Christie! Kank question!

[Angela Christine]

The real problem isn't finding the sexual organs of a male kank, presumably there are male kanks and they do have sexual organs of some kind.  The fact that you have to get them out of the shell just makes them more oyster-like.  The real problem is the name, why shieldwall oysters?  Are there any other kind of "oysters" in the known world?  Are there any records or legends of wetter times that mention oysters?  

It is a puzzle wrapped in an enigma, with a chewy chocolate center.


AC