Charles H. Spurgeon on Psalms 104:26

There go the ships. So that ocean is not altogether deserted of mankind. It is the highway of nations, and unites, rather than divides, distant lands. There is that leviathan, whom thou hast made to play therein. Them huge whale turns the sea into his recreation ground, and disports himself as God designed that he should do. The thought of this amazing creature caused the psalmist to adore the mighty Creator who created him, formed him for his place and made him happy in it. Our ancient maps generally depict a ship and whale upon the sea, and so show that it is most natural, as well as poetical, to connect them both with the mention of the ocean.