What did you expect from a sermon to the fish? They got a brilliant theology of Creation, from Scripture to science without any contradictions. Laudato Si!
The fishes being set in order and array, Saint Antony began solemnly to preach, and so spake: “My brothers the fish, much are ye bounden so far as in ye lies, to give thanks to our Creator, who hath given you so noble an element for your abode; in such sort that as it pleaseth you, ye have sweet waters and salt; and hath given you many a refuge to escape the storms withal; nay more, hath given you a clear, translucent element, and food by the which ye may live.
God, your kind and bountiful Creator, when He created you, gave you commandment to increase and multiply, and poured on you His blessing: then whenas the deluge came and one and all the other beasts all died, you alone did God keep safe from harm. Moreover hath He given you fins that ye may roam where’er ye please.
To you the grace was given, by God’s command, to save the prophet Jonah, and after the third day to throw him safe and whole upon the land. Ye brought the tribute-money to our Lord Jesu Christ, who was so poor, He had not aught to pay.Ye were the food of the eternal King, Jesus Christ, before the Resurrection and thereafter, through a mystery wondrous rare; for all the which things much are ye bound to bless and praise God, who hath given you so many and so great blessings more than to other creatures.”
Antony with some of his fish, alongside Francis. Public Domain via Wikipedia.