This figure is the Starry Flounder (or in Japanese, Kawagarei, among other names), Platichthys stellatus , model 31 and number 161 from the second series—and, sadly, THE LAST FIGURE IN THE SERIES! Which means that until/unless I get my hands on a representative of the ones I’m missing, or a few rare variants, this is the end of the line2 for the Yujin Freshwater Fishes Books 1 and 2.