Deuteronomy 4:18

18 the likeness of any animal that moves on the ground, the likeness of any fish that is in the waters beneath 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 corrupt yourselves and make yourselves a graven image, the similitude of any figure, the likeness of male or female,

17 the likeness of any beast that is on the earth, the likeness of any winged fowl that flies in the air,

18 the likeness of any animal that moves on the ground, the likeness of any fish that is in the waters beneath the earth,

19 And lest thou lift up thine eyes unto heaven, and when thou seest the sun and the moon and the stars, even all the host of heaven, and should be driven to worship them and serve them because the LORD thy God has conceded them unto all the peoples under all the heavens.

20 But the LORD has taken you and brought you forth out of the iron furnace, even out of Egypt, to be unto him the people of his inheritance, as ye are this day.