Similar to another PTIJ question I asked (PTIJ: Oscar the Grouch getting Tzara'at on his garbage can), if Gary the snail from Spongebob had Da'as and became a Ger, but subsequently got Tzara'at on his shell, would that constitute Tzara'at of the body, of one's clothing, or of one's house?
The following points can be argued:
- One could argue that the snail shell is Batul to the snail, and be considered part of one's guf, thereby being Tzara'at of the body.
- Or it can be argued that it's like clothing, since there are snails that remove their own shell, and wear it like clothing.
- Or it can be argued it's like a house, since the snail lives in it.
Additionally, although round houses aren't subject to Tzara'at (Mishna Nega'im 12:1), some snails have cone-shaped shells.
And there are snails in Israel (Sphincterochila boissieri), ruling out the notion that houses outside Israel aren't subject to Tzara'at.