Deuteronomy 4:18

18 the likeness of any reptile which creeps on the earth, the likeness of any fish of those which are in the waters under the earth;

Deuteronomy 4:18 Meaning and Commentary

Deuteronomy 4:18

The likeness of anything that creepeth on the ground
As serpents by many; and indeed that creature is introduced into almost all the idolatries of the Heathens, which seems to take its rise from the serpent Satan made use of to deceive our first parents:

the likeness of any fish that is in the waters beneath the earth;
as the crocodile and hippopotamus, or river horse, by the Egyptians; and Dagon and Derceto, supposed to be figures in the form of a fish, among the Phoenicians.

Deuteronomy 4:18 In-Context

16 lest ye transgress, and make to yourselves a carved image, any kind of figure, the likeness of male or female,

17 the likeness of any beast of those that are on the earth, the likeness of any winged bird which flies under heaven,

18 the likeness of any reptile which creeps on the earth, the likeness of any fish of those which are in the waters under the earth;

19 and lest having looked up to the sky, and having seen the sun and the moon and the stars, and all the heavenly bodies, thou shouldest go astray and worship them, and serve them, which the Lord thy God has distributed to all the nations under heaven.

20 But God took you, and led you forth out of the land of Egypt, out of the iron furnace, out of Egypt, to be to him a people of inheritance, as at this day.