Have you met Goldie?

He was reportedly one of the bigger goldfish ever lived in the world. Goldie currently stands at 15.7 inch (data as of April 2008) and is set to compete against the world’s record of the largest goldfish, Carassius auratus, at 18.7 inch. In addition to his size, Goldie has outlived the 10 years lifespan of an average golfish and is now 15 years old.
The secret to this longevity hulk? His owner, a 84 year old Britian, Ada Shaw claims that meticulous care and love probably aids in its growth. Fish flakes are given twice a day, once every morning and evening. If the sunlight is too strong the curtains are drawn; and at night, a light is left on for Goldie. Ada talks to Goldie in order to keep it occupied. Once a week, the tank that Goldie resides is cleaned and topped up with a minute amount of hot water.

The thorough regime has helped Goldie not only in his growth in size, Goldie has also enjoyed a longer lifespan. This was the same for his fellow tank-mate, the other massive goldfish which was bought together with Goldie that passed away 5 years ago.
Source: MailOnline