This strain is one of the inbred strains from orange-red Medaka. Derived from a different pair in the same stock from which HO5 was derived. The original stock was obtained from a local dealer in Chiba prefecture. This strain belongs to the Southern Japanese Population. This fish spawn much number of eggs comparing with other inbred lines, and the hatching rate is high. Although this fish has a high fatality rate in fry and has shoter lifespan.
This strain is maintaining as a closed colony (descendants from multiple parents) after F123 generations with brother-sister mating.