וְאָנוּ֙ הַדַּיָּגִ֔ים וְאָ֣בְל֔וּ כָּל־מַשְׁלִיכֵ֥י בַיְא֖וֹר חַכָּ֑ה וּפֹרְשֵׂ֥י מִכְמֹ֛רֶת עַל־פְּנֵי־מַ֖יִם אֻמְלָֽלוּ׃
The fishers also shall lament, and all they that cast angle into the Nile shall mourn, and they that spread nets upon the waters shall languish.
Rashi on Isaiah
And...shall lament Heb. וְאָנוּ, an expression of lamentation and mourning.
Rashi on Isaiah
the fishermen They are the Egyptians who catch fish from the Nile, which spreads and goes up into many canals made on its banks over the surface of all the land of Egypt, unlike other rivers.