The interpretation timeline
Genesis 1:21 Douay-Rheims

And God created the great whales, and every living and moving creature, which the waters brought forth, according to their kinds, and every winged fowl according to its kind. And God saw that it was good.

A.D. 379 – 1832 8 witnesses 10 excerpts

Patristic

before A.D. 750
379
A.D.
Basil of Caesarea Patristic
c. A.D. 330–379
“What necessary object was there that did not immediately appear? What object of luxury was not given to man? Some to supply his needs, some to make him contemplate the marvels of creation. Some are terrible, so as to take our idleness to school. God created great whales. Genesis 1:21 Scripture gives them the name of great not because they are greater than a shrimp and a sprat, but because the size of their bodies equals that of great hills. Thus when they swim on the surface of the waters one often sees them appear like islands. But these monstrous creatures do not frequent our coasts and shores; they inhabit the Atlantic ocean. Such are these animals created to strike us with terror and awe. If now you hear say that the greatest vessels, sailing with full sails, are easily stopped by a very small fish, by the remora, and so forcibly that the ship remains motionless for a long time, as if it had taken root in the middle of the sea, do you not see in this little creature a like proof of the power of the Creator? Sword fish, saw fish, dog fish, whales, and sharks, are not therefore the only things to be dreaded; we have to fear no less the spike of the stingray even after its death, and the sea-hare, whose mortal blows are as rapid as they are inevitable. Thus the Creator wishes that all may keep you awake, so that full of hope in Him you may avoid the evils with which all these creatures threaten you. But let us come out of the depths of the sea and take refuge upon the shore. For the marvels of creation, coming one after the other in constant succession like the waves, have submerged my discourse. However, I should not be surprised if, after finding greater wonders upon the earth, my spirit seeks like Jonah's to flee to the sea. But it seems to me, that meeting with these innumerable marvels has made me forget all measure, and experience the fate of those who navigate the high seas without a fixed point to mark their progress, and are often ignorant of the space which they have traversed. This is what has happened to me; while my words glanced at creation, I have not been sensible of the multitude of beings of which I spoke to you. But although this honourable assembly is pleased by my speech, and the recital of the marvels of the Master is grateful to the ears of His servants, let me here bring the ship of my discourse to anchor, and await the day to deliver you the rest. Let us, therefore, all arise, and, giving thanks for what has been said, let us ask for strength to hear the rest. Whilst taking your food may the conversation at your table turn upon what has occupied us this morning and this evening. Filled with these thoughts may you, even in sleep, enjoy the pleasure of the day, so that you may be permitted to say, I sleep but my heart wakes, Song of Songs 5:2 meditating day and night upon the law of the Lord, to Whom be glory and power world without end. Amen.”
Source
“How then, they say, can Scripture describe all the plants of the earth as seed-bearing, when the reed, couch-grass, mint, crocus, garlic, and the flowering rush and countless other species, produce no seed? To this we reply that many vegetables have their seminal virtue in the lower part and in the roots. The reed, for example, after its annual growth sends forth a protuberance from its roots, which takes the place of seed for future trees. Numbers of other vegetables are the same and all over the earth reproduce by the roots. Nothing then is truer than that each plant produces its seed or contains some seminal virtue; this is what is meant by "after its kind." So that the shoot of a reed does not produce an olive tree, but from a reed grows another reed, and from one sort of seed a plant of the same sort always germinates. Thus, all which sprang from the earth, in its first bringing forth, is kept the same to our time, thanks to the constant reproduction of kind.”
Source
“Let the earth bring forth the living creature. Behold the word of God pervading creation, beginning even then the efficacy which is seen displayed to-day, and will be displayed to the end of the world! As a ball, which one pushes, if it meet a declivity, descends, carried by its form and the nature of the ground and does not stop until it has reached a level surface; so nature, once put in motion by the Divine command, traverses creation with an equal step, through birth and death, and keeps up the succession of kinds through resemblance, to the last. Nature always makes a horse succeed to a horse, a lion to a lion, and an eagle to an eagle, and preserving each animal by these uninterrupted successions she transmits it to the end of all things. Animals do not see their peculiarities destroyed or effaced by any length of time; their nature, as though it had been just constituted, follows the course of ages, for ever young.”
Source
397
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“In the pine cone nature seems to express an image of itself. It preserves its peculiar properties which it received from that divine and celestial command, and it repeats in the succession and order of the years its generation until the end of time is fulfilled. The Word of God permeates every creature in the constitution of the world. Hence, as God had ordained, all kinds of living creatures were quickly produced from the earth. In compliance with a fixed law they all succeed each other from age to age according to their aspect and kind. The lion generates a lion; the tiger, a tiger; the ox, an ox; the swan, a swan; and the eagle, an eagle. What was once enjoined became in nature a habit for all time. Hence the earth has not ceased to offer the homage of its service. The original species of living creatures is reproduced for future ages by successive generations of its kind.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
“התנינים THE HUGE CREATURES — the large fishes that are in the sea; and according to the statement of the Agada (Bava Batra 74b) it means here the Leviathan and its consort which He created male and female. He, however, killed the female and preserved it in salt for the benefit of the righteous in the time to come, for had they been permitted to be fruitful and to multiply the world could not have endured because of them. נפש חיה — that have vitality.”
Source
1167
A.D.
Ibn Ezra Jewish
1089–1167
“"that crawls" - meaning, "goes", and there are those who way that the [letter] shin is in place of the [letter] samech, and there are those who say”
1270
A.D.
Ramban Jewish
1194–1270
“AND G-D CREATED THE GREAT SEA-MONSTERS. Because of the great size of these creatures, some consisting of many Persian miles — the Greeks in their books even relate that they knew some of them to be 500 Persian miles long, and our Rabbi likewise spoke of them in magnifying terms — on account of that, Scripture explicitly ascribes their creation to G-d for He brought them forth from nought from the beginning, as I have explained the expression b’riyah (creation). Similarly, Scripture does so in the case of man. on account of his exaltedness, thus informing us that man, with his mind and reason, also came forth from nought. I wonder why it does not say “and it was so” on this day? Perhaps it would not have been possible to mention And He created after saying, “and it was so,” since it refers to the preceding., etc.) would have concluded with the expression and it was so, it would have implied the creation of the sea-monster, since they also swarm in the waters. How then could it say in the following verse, And G-d created the sea-monster, as if it were another act of creation? To say, and it was so after vayibra (And He created) is also not possible for this would be redundant. Hence on the fifth day, the expression and it was so does not appear in Scripture. Our Rabbis have said that the great sea-monsters are the Leviathan and its mate which He created male and female. He then slew the female and preserved it in salt for the benefit of the righteous in the hereafter. It is possible that on account of this it would not have been appropriate to say concerning their creation, “and it was so,” since they did not continue to exist [in the form in which they were created].”
Source

Reformation

c. 1500 – 1650
1550
A.D.
Sforno Jewish
c. 1475–1550
““And G-d created the crocodiles” – the generative power imbued it the water was not adequate to produce the first crocodiles without seed, until He created power adequate for this [task].”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And God created great whales,.... Which the Targums of Jonathan and Jarchi interpret of the Leviathan and its mate, concerning which the Jews have many fabulous things: large fishes are undoubtedly meant, and the whale being of the largest sort, the word is so rendered. Aelianus, from various writers, relates many things of the extraordinary size of whales; of one in the Indian sea five times bigger than the largest elephant, one of its ribs being twenty cubits (r); from Theocles, of one that was larger than a galley with three oars (s); and from Onesicritus and Orthagoras, of one that was half a furlong in length (t); and Pliny (u) speaks of one sort called the "balaena", and of one of them in the Indian sea, that took up four aces of land, and so Solinus (w); and from Juba, he relates there were whales that were six hundred feet in length, and three hundred sixty in breadth (x) but whales in common are but about fifty, seventy, eighty, or at most one hundred feet. Some interpret these of crocodiles, see Eze 29:3 some of which are twenty, some thirty, and some have been said to be an hundred feet long (y) The word is sometimes used of dragons, and, if it has this sense here, must be meant of dragons in the sea, or sea serpents, leviathan the piercing serpent, and leviathan the crooked serpent, Isa 27:1 so the Jews (z); and such as the bishop of Bergen (a) speaks of as in the northern seas of a hundred fathom long, or six hundred English feet; and who also gives an account of a sea monster of an enormous and incredible size, that sometimes appears like an island at a great distance, called "Kraken" (b); now because creatures of such a prodigious size were formed out of the waters, which seemed so very unfit to produce them; therefore the same word is here made use of, as is in the creation of the heaven and the earth out of nothing, Gen 1:1 because this production, though not out of nothing, yet was an extraordinary instance of almighty power, And every living creature that moveth, which the waters brought forth abundantly after their kind; that is, every living creature that swims in the waters of the great sea, or in rivers, whose kinds are many, and their numbers not to be reckoned; see Gill on Gen 1:20. and every winged fowl after his kind; every fowl, and the various sorts of them that fly in the air; these were all created by God, or produced out of the water and out of the earth by his wonderful power: and God saw that it was good; or foresaw that those creatures he made in the waters and in the air would serve to display the glory of his perfections, and be very useful and beneficial to man, he designed to create. (Some of the creatures described by the ancients must refer to animals that are now extinct. Some of these may have been very large dinasours. Ed.) (r) Hist. Animal. l. 16. c. 12. (s) Ib. l. 17. c. 6. (t) Ibid. (u) Nat. Hist. l. 9. c. 3. (w) Polyhistor. c. 65. (x) Plin. Nat. Hist. l. 32. c. 1. (y) See Thevenot's Travels, par. 1. c. 72. p. 246. Harris's Voyages, &c. vol. 1. p. 287, 485, 759. (z) T. Bab. Bava Bathra, fol. 74. 2. (a) History of Norway, p. 199. (b) Ibid. p. 210, &c.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“And God created great whales - התנינם הגדלים hattanninim haggedolim. Though this is generally understood by the different versions as signifying whales, yet the original must be understood rather as a general than a particular term, comprising all the great aquatic animals, such as the various species of whales, the porpoise, the dolphin, the monoceros or narwal, and the shark. God delights to show himself in little as well as in great things: hence he forms animals so minute that 30,000 can be contained in one drop of water; and others so great that they seem to require almost a whole sea to float in.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.