Deuteronomy 14:9 Halakhah

אֶת־זֶה֙ תֹּֽאכְל֔וּ מִכֹּ֖ל אֲשֶׁ֣ר בַּמָּ֑יִם כֹּ֧ל אֲשֶׁר־ל֛וֹ סְנַפִּ֥יר וְקַשְׂקֶ֖שֶׂת תֹּאכֵֽלוּ׃

These ye may eat of all that are in the waters: whatsoever hath fins and scales may ye eat;