דָּגָה

Genesis 1:26 בִדְגַ֨ת over [the] fish of

Then God said, “Let Us make man in Our image, after Our likeness, to rule over the fish of the sea and the birds of the air, over the livestock, and over all the earth itself and every creature that crawls upon it.”

Here: Dagah is a collective, “fish” as a whole class. The attached preposition be- is the one the verb radah normally takes for what is ruled: “rule over.”

Genesis 1:28 בִּדְגַ֤ת over [the] fish of

God blessed them and said to them, “Be fruitful and multiply, and fill the earth and subdue it; rule over the fish of the sea and the birds of the air and every creature that crawls upon the earth.”

Here: Dagah is a group word meaning fish in general. The attached "b-" is the normal way Hebrew says "rule over".

Exodus 7:18 וְהַדָּגָ֧ה and the fish

The fish in the Nile will die, the river will stink, and the Egyptians will be unable to drink its water.’”

Exodus 7:21 וְהַדָּגָ֨ה and the fish

The fish in the Nile died, and the river smelled so bad that the Egyptians could not drink its water. And there was blood throughout the land of Egypt.

Numbers 11:5 הַדָּגָ֔ה the fish

We remember the fish we ate freely in Egypt, along with the cucumbers, melons, leeks, onions, and garlic.

Deuteronomy 4:18 דָּגָ֥ה fish

or of any creature that crawls on the ground or fish that is in the waters below.

Psalm 105:29 דְּגָתָֽם׃ fish their

He turned their waters to blood and caused their fish to die.

Here: "Their fish," meaning fish as a whole group, like English "livestock" or "poultry." This exact collective form is the one used in Exodus 7:18, 21 ("the fish in the Nile died"), so the psalm is echoing the Exodus wording. The fish were a staple food in Egypt (Num 11:5).

Isaiah 50:2 דְּגָתָם֙ fish their

Why was no one there when I arrived? Why did no one answer when I called? Is My hand too short to redeem you? Or do I lack the strength to deliver you? Behold, My rebuke dries up the sea; I turn the rivers into a desert; the fish rot for lack of water and die of thirst.

Here: 'Their fish', a collective noun (all the fish taken together), so the verbs are singular. 'Their' refers to the rivers.

Ezekiel 29:4 דְגַת־ דְּגַ֣ת [the] fish of

But I will put hooks in your jaws and cause the fish of your streams to cling to your scales. I will haul you up out of your rivers, and all the fish of your streams will cling to your scales.

Ezekiel 29:5 דְּגַ֣ת [the] fish of

I will leave you in the desert, you and all the fish of your streams. You will fall on the open field and will not be taken away or gathered for burial. I have given you as food to the beasts of the earth and the birds of the air.

Ezekiel 47:9 הַדָּגָ֖ה the fish

Wherever the river flows, there will be swarms of living creatures and a great number of fish, because it flows there and makes the waters fresh; so wherever the river flows, everything will flourish.

Here: "The fish": a collective noun for fish as a whole population. Genesis 1:26, 28 uses the same word for 'the fish of the sea' over which humans are to rule.

Ezekiel 47:10 דְגָתָ֔ם כִּדְגַ֛ת fish their, like [the] fish of

Fishermen will stand by the shore; from En-gedi to En-eglaim they will spread their nets to catch fish of many kinds, like the fish of the Great Sea.

Jonah 2:1 הַדָּגָֽה׃ the fish

From inside the fish, Jonah prayed to the LORD his God,

Here: A plain word for fish. The narrator says nothing about what kind. Oddly, the form is feminine here, though the masculine 'dag' is used in 1:17 and 2:10. Most scholars take this as a variation in style or a 'fish' that can mean fish in general, while ancient Jewish interpreters read meaning into it (see debates).