I acquired five ranchus - Matsuyama bloodline outcrossed by Robert Crosby with Oishi x Matsuyama cross (earlier produced by Gary Hater). So technically the fish I have are ¾ Matsuyama and ¼ Oishi. Both Matsuyama bloodline created under Mr. Ishikawa and Mr. Yasusaru Oishi's ranchu bloodlines were introduced to USA from Japan by Steven Carney of Neo Ranchu USA, around 2004-2006.
Each ranchu bloodline corresponds to breeder's personal selection, preferences and new trends. Head growth and body shape, color pattern, etc. all vary between different bloodlines, giving them a set of specific characteristics. Matsuyama bloodline inherits classic TVR body shape, where back outline is long and reminiscent of a Japanese comb. Their scales tend to be small and neatly placed, creating seamless and beautiful body cover.
|Classic Long Japanese Boxwood Comb|
Matsuyama ranchu do not develop large head growth during their tosai age. However it appears to be a good thing, as developing slowly the head growth has a higher chance to be more proportionate and balanced with the rest of the body as the fish matures. A little mix of Oishi bloodline could add a stronger head growth and peduncle. The balance in ranchu appearance is one of the most important characteristics of this goldfish.
My ranches are close to 10 month old now and I have been observing their head growth development for over five month. It slowly takes shape, but still needs more time to develop. I have been using foods that help to boost the head growth - bloodworms and chicken eggs. (One thing with eggs - they can be messy and can easily spoil the water. So, I feed it once a week in a separate container where my fish waits during the water change.)
All I need now are warmer days, the time when ranchu will start developing faster, reaching their sexual maturity.