Fishing near Castanhal, Pará

Castanhal sits in northeastern Pará, surrounded by a network of rivers and igarapés that drain through the Amazon lowlands. The closest waters include the Rio Marapanim, Rio Tauá, Rio Caraparu, and Rio Itá, along with smaller igarapés like Igarapé Inhangapi — typical blackwater and whitewater Amazonian streams where tucunaré and aracu are the main targets for local anglers fishing from small boats or the bank.