Frequently Asked Questions
Q: What does Deuteronomy 14:10 mean?
A: Deuteronomy 14:10 is part of the Torah's laws of kosher food (kashrut). It states that any creature from the water that does not have fins and scales is forbidden to eat and is considered unclean (tamei) according to Jewish law. This means fish like salmon or tuna (which have fins and scales) are kosher, while shellfish like shrimp or lobster (which lack scales) are not.
Q: Why are fins and scales important for kosher fish?
A: According to Rashi and other Jewish commentators, fins and scales are signs that distinguish kosher fish. The Talmud (Chullin 66b) explains that scales must be removable without damaging the skin. Rambam (Hilchot Ma'achalot Asurot 1:24) teaches that these physical traits symbolize spiritual refinement—scales represent protection from impurity, and fins represent movement toward holiness.
Q: How do we know which fish are kosher today?
A: Jewish tradition relies on a mesorah (a reliable tradition) passed down through generations to identify kosher fish. The Shulchan Aruch (Yoreh De'ah 83) rules that a fish must have visible, removable scales when taken from the water to be kosher. Common kosher fish include salmon, herring, and carp, while eels, catfish, and shellfish are not kosher.
Q: What is the spiritual reason behind this kosher law?
A: The Midrash (Vayikra Rabbah 13:3) teaches that kosher laws elevate Jews spiritually by instilling discipline and separation from impurity. Fish with fins and scales typically live in cleaner waters and swim against currents, symbolizing moral strength (Ramban on Deuteronomy 14:9). By eating only kosher fish, we connect physical sustenance with spiritual growth.
Q: Does this verse apply to all seafood?
A: Yes, this verse applies to all aquatic creatures. The Talmud (Niddah 51b) clarifies that even if a sea creature has fins but no scales (like some types of eels), it is non-kosher. Conversely, if it has scales but no fins (which is biologically rare), it is also forbidden. Examples of non-kosher seafood include all shellfish (shrimp, crab), squid, and octopus.
Prohibition of Non-Kosher Fish
The verse (Devarim 14:10) states: "And whatever has no fins and scales you may not eat; it is unclean to you." This establishes one of the fundamental laws of kashrut regarding aquatic creatures. According to Halacha, only fish possessing both snapir (fins) and kaskeset (scales) are permitted for consumption.
Rashi's Explanation
Rashi (Devarim 14:10) clarifies that the Torah specifies both fins and scales because some fish have fins but lack scales (e.g., the shibuta mentioned in Chullin 66b). Thus, both signs are necessary to determine kosher status. The Talmud (Chullin 66b) further explains that any fish possessing scales will inherently have fins, but the inverse is not always true.
Rambam's Halachic Ruling
Rambam (Hilchot Ma'achalot Asurot 1:24) codifies this law, stating that any sea creature lacking visible scales at some point in its lifecycle is forbidden. This includes species that shed scales when removed from water but had them while alive.
Midrashic Insight
The Midrash (Vayikra Rabbah 13:3) connects this mitzvah to spiritual refinement: just as fins and scales protect fish, the kosher laws protect the Jewish soul from impurity. The Sages teach that non-kosher species negatively influence one's character traits (middot).
Practical Applications