A year ago, I purchased a tiny white/red ryukin as somewhat of an "afterthought". I was buying a large butterfly online, and I wanted a second fish to make shipping worthwhile. Also, I wanted a small ryukin to provide company for a little fantail I was keeping in a tank alone at the time. So, I got Clover. At first I thought Clover was a female, but as time went on he began to sport some very manly breeding stars, indicating he was actually a male.
Clover has grown in leaps and bounds within the past year! Unfortunately I didn't weigh him when he first arrived, but the first time I weighed him was on December 8th, 2011, and he weighed only 27 grams at that time. I weighed him again on March 23rd of 2012, and he was up to 65 grams! So in just a few months, he more than doubled in size! I attribute the growth spurt to the increased feedings I started, by using an automatic feeder to space out the feedings throughout the day. I also started keeping my tanks understocked, allowing more room per fish and more dilution of waste.
I'm pretty proud of the little (not so little anymore!) guy.