Though the average specimen in captivity might live 25 or 35 years, an old koi named Hanako, from Mino province in Japan, has been shown to be over 215 years old based on analysis of her scales, and other 100+ year old fish are known from the same pond. Koi, like wild carp, can grow to 36 or more under perfect conditions.
The gold and silver medals weigh 412 grams (0.9 pounds) and the bronze medal weighs 357 grams (0.78 pounds). They are the biggest and heaviest summer Olympic medals ever made.
Standard gold bars should weigh approximately 400 troy ounces. However, refiners are not required to have a bar that weighâs exactly 400 ounces, the logistics of that process would weigh heavily on the refiner. Instead, you have a specified range, gold bars can range from 350 ounces to 430 troy