Adam Clarke on Psalms 104:27

These wait all upon thee - The innumerable fry of the smaller aquatic animals, as well as whales, dolphins, porpoises, and sharks, all have their meat from God. He has in his gracious providence furnished that sort of food which is suitable to all. And this provision is various; not only for every kind of fish does God provide food, but a different kind of aliment for each in its different periods of growth. Here are displayed the goodness and infinitely varied providence of God: "He giveth them their meat in due season."