Leviticus 11:9 ESV
These you may eat, of all that are in the waters. Everything in the waters that has fins and scales, whether in the seas or in the rivers, you may eat.
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Life According to the Bible, and the Scientific Evidence
So one may observe that the definition of a nervous system must not be thought of in terms of its basic function (response to stimuli), but in terms of its makeup (specialized cells).
answersingenesis.org