Chullin 66 - July 5, 20 Tamuz

The braita from the school of Rav and the braita from the school of Rabbi Yishmael disagree about whether a grasshopper with a long head is kosher. The source of the dispute stems from their application of different hermeneutical principles to the verse. Further on, the Gemara raises two difficulties against other parts of the braita of the school of Rabbi Yishmael and resolves them.

The definitive kosher signs of fish are fins and scales. A fish that lacks scales in its youth but will grow them later, or a fish that has scales but sheds them upon leaving the water, is kosher. Since any fish with scales inherently has fins, the Torah did not need to specify fin, but did so to magnify the Torah and make it glorious.

The need for two separate verses, one permitting fish with fins and scales and one prohibiting fish without fins and scales, is to establish both a positive and a negative commandment for one who transgresses.

The words "This you can eat from all that are in the waters," which are seemingly superfluous, teach that one who drinks water from pits, ditches, and caves does not need to be concerned about fish that grew there that lack fins and scales, as they are not included in the prohibition.