Flagtail ProchilodusOverview The Flagtail Prochilodus has a wide distribution throughout the central and western portions of the Amazon river and its tributaries. This striking characin grows to an impressive size and will require a spacious aquarium from the outset. Although it can be safely housed alongside other medium sized fish species (e. g. other characins of similar size, knifefish, L number plecos, peaceful cichlids etc), it can be rather antagonistic towards