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The Kashrut of Sturgeon: A Halachic Debate
This collection examines the longstanding halachic question of whether sturgeon is a permitted fish under Jewish dietary law. Sources range from biblical foundations on fish signs (fins and scales) through rabbinic definitions in the Talmud, medieval codifications by the Rambam, and early modern responsa from the Noda BiYehudah and Chatam Sofer, all debating whether the sturgeon's ganoid scutes qualify as true kaskeset (scales).
כל שיש לו סנפיר וקשקשת טהור
Pikuach Nefesh and Forbidden Materials in Medical Life-Saving
Jewish law addresses whether life-saving medical procedures using ordinarily forbidden substances—such as non-kosher animal organs in transplantation—are permissible under the principle of pikuach nefesh. Sources from Tanakh through the Acharonim establish that preserving life overrides virtually all Torah prohibitions, including dietary laws, when a person faces mortal danger.
וְחַי בָּהֶם וְלֹא שֶׁיָּמוּת בָּהֶם