Eliminating an infestation can be amplified by control of copepods in water. In North America, introduced "B. acheilognathi" are also known to infect threatened native species like humpback chub ("Gila cypha"), Mojave tui chub ("Siphateles bicolor mohavensis"), Virgin roundtail chub ("Gila robusta seminuda"), woundfin minnow ("Plagopterus argentissimus"), "Profundulus portillorum" and the crucian carp ("Carassius carassius"). The discovery of the tapeworm’s substantial infections within the crucian carp population in the UK is of particular concern because there have not been any known natural tapeworm parasites of these crucian carp. A plausible cause may be that the crucian carp have limited immunological defenses against this parasite. In Australia, introduced "B. acheilognathi" has caused fish kills of Western Carp Gudgeon and is strongly suspected of affecting other Australian freshwater fish species.