Fig. 1

A 10-week-old chgH-rfp transgenic marine medaka Oryzias dancena female at full maturity. RFP signals were expressed in the liver with the progressive maturation of oocytes in the ovary (ova). Under the daylight condition (left), the reddish liver was apparently seen and intensified red fluorescence in the liver of the same female was visualized under the dark field of microscopy (right). The bar is 5 mm