Leviticus 11:12
Any that does not have a fin and scales in the water--it [is] a detestable thing to you.
Treasury of Scripture Knowledge
Summary
Whatsoever hath no fins nor scales in the waters, that shall be an abomination unto you.
General references
Bible References
General references
Deuteronomy 14:9
"This [is what] you shall eat from all that [is] in the water: {everything} {that has fins and scales} you may eat.