Yabbie hidey house by LeHof

This is a 3D printable ornament for your fish tank or pond that can be used by yabbies to hide. What is a "yabbie" you ask?
http://en.wikipedia.org/wiki/Yabby

But of course this can be used by fish or other critters. My Ramshorns seem to love it at the moment and have been laying their eggs all over it.