The Colorado pikeminnow, P. lucius, is the largest member of the genus, ranging from 4 to 9 lb (2 to 4 kg) in adult fish with occasional specimens up to 25 lb (11 kg).
The Colorado pikeminnow, a species within the genus P. lucius, is the largest member of that group, growing up to 9 pounds (4 kilograms) in size, though some individuals can reach as much as 25 pounds (11 kilograms).