 Attempts to acclimatize common carp and grass carp in Belskoe Lake failed (carp catch usually has no point value in fishing competitions).Silver carp ("Hypophthalmichthys molitrix"), released in 1993, survived and established a viable population despite very long sexual maturity period (12 to 13 years in Belskoe Lake).One silver carp, caught in 2006, reached 130 centimeters in length and weighed over 20 kilograms.