There go the ships - There the vessels move along - objects that would, of course, attract the attention of one looking at the sea, and admiring its wonders. The psalmist is describing the active scenes on the surface of the globe, and, of course, on looking at the ocean, these would be among the objects that would particularly attract his attention.
There is that leviathan - The Septuagint and the Vulgate render this, dragon. On the meaning of the word "leviathan," see the notes at Job 41:1.
Whom thou hast made - Margin, as in Hebrew, "formed." The idea of creation is implied in the word.
To play therein - As his native element. To move about therein; to make quick and rapid motions, as if in sport.

There go the ships - By means of navigation, countries the most remote are connected, and all the inhabitants of the earth become known to each other. He appears at this time to have seen the ships under sail.
That leviathan - This may mean the whale, or any of the large marine animals. The Septuagint and Vulgate call it dragon. Sometimes the crocodile is intended by the original word.
To play therein - Dreadful and tempestuous as the sea may appear, and uncontrollable in its billows and surges, it is only the field of sport, the play-ground, the bowling-green to those huge marine monsters.

There go the ships,.... From place to place, from one end of the world to the other, for the sake of merchandise (r); this is one of the four things that were too wonderful for Solomon, "the way of a ship in the midst of the sea", Proverbs 30:19 though navigation was improved in his times indeed not so much as it is now. The original of ships was doubtless Noah's ark, so that they owe their first draught to God himself. They seem to be an emblem of the church and people of God passing through the sea of this world to the haven of eternal rest. The ship is but a small vessel, and takes up but a small room in comparison of the vast ocean on which it is; and so the church of Christ is but small, a little city, and few men in it, a little flock, a small remnant: a ship is unfixed and unsettled, sometimes here and sometimes there; so the church of Christ is sometimes in one place, and sometimes in another; nor is this world the rest of God's people, nor have they any continuing city here; for, as a ship is tossed with tempests, so are they with the waves of afflictions, the temptations of Satan, and the persecutions of men; and sometimes, like Paul, and the mariners with him, have no sight of sun and stars for many days, of the sun of righteousness, or of the stars, the ministers of the word; when sailing is dangerous it bodes perilous times, through the impure lives of professors, and impious doctrines of false teachers, whereby many suffer shipwreck; yet all the Lord's people get safe ashore, having a good pilot, Christ, to conduct them; and the good anchor of hope, sure and steadfast.
There is that leviathan, whom thou hast made to play therein; the Targum adds,
"for the righteous at the feast of the house of his habitation.''
Of this creature there is an account in Job 41:1. Some take it to be the crocodile, which is both a sea and river fish; the Septuagint, Vulgate Latin, Ethiopic, and Arabic versions, and so Apollinarius, call it the dragon; it is more generally thought to be the whale; Aben Ezra says it is the name of every great fish; it is a sportive creature, tumbles about in the great sea, and plays with the waters of it, which it tosses up in great quantities; and with the fishes of the sea, which it devours at pleasure; and laughs at the shaking of the spear; and to which mariners throw out their empty casks to play with, when near them, and they in danger by it; see Job 41:5. This creature is generally reckoned by the ancients a figure of Satan, it being king over all the children of pride, Job 41:34 as he is the prince of the power of the air, and god of this world; who has been playing his tricks in it from the beginning of it, not only deceiving our first parents, but all the nations of the world; nor are saints ignorant of his devices. It sometimes describes a tyrannical prince, as the kings of Babylon and of Egypt, Isaiah 27:1 and is a true picture of antichrist, the beast which rose out of the sea; nor is there any like him on earth; see Revelation 13:1.
(r) So Homer calls ships , Iliad. 3. v. 46.

leviathan-- (Job 40:20) heightens the estimate of the sea's greatness, and of His power who gives such a place for sport to one of His creatures.

Leviathan - The whale. Therein - Who being of such a vast strength and absolute dominion in the sea, tumbles in it with great security, and sports himself with other creatures.