en_tn/isa/19/07.md

The fishermen will wail and mourn, and all who cast a hook into the Nile will mourn like those who spread nets on the waters will grieve

The reason they are grieving can be made explicit: "and the fishermen who try to catch fish with hooks or nets will cry in despair because all the fish in the Nile have died." (See: rc://en/ta/man/translate/figs-explicit)