King James Version (KJV)
He turned their waters into blood, and slew their fish.
Modern English
He turned their waters into blood and caused their fish to die.
Hebrew
הָ֭פַךְ אֶת מֵימֵיהֶ֣ם לְדָ֑ם וַיָּ֖מֶת אֶת דְּגָתָֽם׃
hapak ʾet meymeyhem ldam vayamet ʾet dgatam