Figure 2

Family breeding design and embryonic observations of the twin-tail grass goldfish. The breeding strain of the twin-tail grass goldfish was obtained using hybridization and selfing. (a) Triangles indicate the wild-type phenotype. Square indicates the twin-tail phenotype. Gray, filled triangles indicate the variation in wild-type. In the F2 generation, three phenotypes were observed. (b) Arrows point to the red blood cell aggregation and bifurcated caudal fin.