וְכָל־הַשֶּׁ֖רֶץ הַשֹּׁרֵ֣ץ עַל־הָאָ֑רֶץ שֶׁ֥קֶץ ה֖וּא לֹ֥א יֵאָכֵֽל׃
And every swarming thing that swarmeth upon the earth is a detestable thing; it shall not be eaten.
Read kabbalistic (mystical) interpretation of Leviticus 11:41: and classical mystical sources.