Fish (Ex 7:18-21)
As a result of the blood, the fish of the Nile died, and Egypt was filled with stench. Other water resources used by the Egyptians were turned to blood as well (7:19). This plague lasted for seven days.

Exodus 7
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Ex 7:1 And the LORD said unto Moses, See, I have made thee a god to Pharaoh: and Aaron thy brother shall be thy prophet.

Exod. 7:9 When Pharaoh, (Akhenaten or Amenhotep IV, 1379-1362 BC), shall speak unto you, saying, Show a miracle, (some power), for you (to so assert yourself in their society): then thou shalt say unto Aaron, Take thy rod (of your hand, the priestly blessing of the kohanim, and teach the Hebrews to tell one another, by marking their own hands so), and cast it, (the palm open and the twelve fingers, with their own symbols which they understand), before Pharaoh, (Akhenaten or Amenhotep IV, 1379-1362 BC), and it shall become a (scientific) serpent, (a religious fact in their own Astrology, by which to accomplish this amassing of large groups of Jews in public places).

Exod. 7:10 And Moses and Aaron went in unto Pharaoh, (Akhenaten or Amenhotep IV, 1379-1362 BC), and they did so as the LORD had commanded: and Aaron cast down his rod before Pharaoh, (Akhenaten or Amenhotep IV, 1379-1362 BC), and before his servants, and it became a serpent (of the science of that day, even startling them in their contemplation of the astronomical facts he was about to announce).

Exod. 7:11 Then Pharaoh, (Akhenaten or Amenhotep IV, 1379-1362 BC), also called the wise men and the sorcerers: now the magicians of Egypt, they also did (argue) in like manner with their enchantments (and attempted denials of this discovery made by Moses, of the unseen planet Uranus, a new God in the world's religions).

Exod. 7:12 For they cast down every man his rod (of scientific astronomical authority) and they became serpents (of scientific truth insisting that Uranus was a mere star): but Aaron's rod, (including the seven planets already known), swallowed up their rods (of scientific jargon by insisting Uranus was a wandering star which changed its alignment among the Constellations).

Exod. 7:13 And he hardened Pharaoh's heart, that he hearkened not unto them; as the LORD had said.

Exod. 7:14 And the LORD said unto Moses, Pharaoh's heart is hardened, he refuseth to let the people go.

Exod. 7:15 Get thee unto Pharaoh, (Akhenaten or Amenhotep IV, 1379-1362 BC), in the morning; lo, he goeth out unto the water (of the common people); and thou shalt stand (at the forefront), by (the crowd of Jews with you), the river's brink, (the flowing crowds of these now spiritually resurrected Jews), against (him, Pharaoh, Akhenaten or Amenhotep IV, 1379-1362 BC, when) he come; and the rod, (in every Jew's hand) which was turned to a serpent (of astronomical fact) shalt thou take in thine hand.

Exod. 7:16 And thou shalt say unto him, The LORD God of the Hebrews, (Uranus, the never before seen God-planet, as a burning bush in the sky of granching star consellations, the sign of he who) hath sent me unto thee, saying, Let my people go, that they may serve me in the wilderness: and, behold, hitherto thou wouldest not hear.

[Plague 1]... of Blood...

Exod. 7:17 Thus saith the LORD, In this thou shalt know that I am the LORD: behold, I will smite with the rod that is in mine hand upon the waters (of all these Egyptian common peoples) which are in the river (of the Hebrews among you), and they, (these waters of humanity), shall be turned (from religious faith in Pharaoh-God) to blood (of religious conversion).

[Plague 2] ...the "fish"...

Exod. 7:18 And the "fish" (who are cold and unemotional), that is, in the river (of the Hebrew people who are following Moses), shall die (out), and the river shall stink (evermore strongly, in the direct Jewish contradiction of Egyptian religion); and the Egyptians shall loathe to drink (the proseltyzing message) of the (flowing) water of the river (of Hebrews now converted to this new faith).

Exod. 7:19 And the LORD spake unto Moses, Say unto Aaron, Take thy rod (of the eight planets), and stretch out thine hand (as an audio-visual aid) upon the waters, (the young people), of Egypt, upon their streams (of intelligent people), upon their rivers (of the non-religious), and upon their ponds (of academic thinkers), and upon all their (disenfranchised) pools of water (of the poverty stricken), that they may become blood, (transformed intuitively); and that there may be blood (of religious conversions) throughout all the land of Egypt, both in vessels of (immigrant Caanitites, Baal worshippers of) wood, and in vessels of (Ashtorah's idols of) stone.

Exod. 7:20 And Moses and Aaron did so, as the LORD commanded; and he lifted up the rod (of truth encoded in his hand), and smote the waters (of the Hebrew peoples) that were in the river (of the Egyptians), in the sight of Pharaoh, (Akhenaten or Amenhotep IV, 1379-1362 BC), and in the sight of his servants; and all the waters (of Jews and Egyptians) that were in the river (of the people to whom Moses spoke) were turned, (converted), to (an intuitive faith written in the very) blood (of their lives).

Exod. 7:21 And the (cold and unemotional) "fish" that was in the river (of these Jews and Egyptians) died; and the river (of that segment of the population) stank, and the Egyptians could not drink of the water of the river; and there was (proselytizing beating in the) blood (of religious faith) throughout all the land of Egypt.

Exod. 7:22 And the magicians, (the astrological preachers), of Egypt did so with their enchantments (and doctrines): and Pharaoh's heart was hardened (in this social stand-off), neither did he hearken unto them, (the Jews); as the LORD had said.

(link to Exodus 8)

Blood (7:17)
The first plague was blood. Its main purpose was to give Pharaoh a taste of God's might and strength, and to demonstrate Moses's confidence in God. According to the Hebrew Bible, Aaron struck the river Nile with Moses's staff, and all the water turned into blood. It says specifically Aaron, because Moses was not allowed to. This is because the Nile saved him when he was a baby and he had to appreciate what it did. This is called Ha-koras ha-tov.

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