Many varieties of fish are found in the Nile system. Notable among those found in the lower Nile system are the Nile perch (a freshwater fish that can grow to be quite large, some weighing as much as 200 kg and measuring 2 meters in length), the bolti (a species of Tilapia), the barbel, several species of catfish, the elephant-snout fish, and the tigerfish, or water leopard.