紫印鱼 zǐ yìn yú anthias pleurotaenia

紫印鱼：【anthias pleurotaenia】鲈科，体长8-10cm，椭圆形。体鲜红色，体侧鳃盖后方各有一个紫色红印，上边到达背鳍基部，下边到达腹鳍，格外明显。鳃盖淡紫色，下颌乳白色，臀鳍有蓝色花纹。有着亮丽的紫色和窈窕的体态很受人们的喜爱是一种经济价值较高的观赏鱼，宠物鱼.

百度翻译提供：

Purple Indian fish: perch family, 8-10cm long, oval. The body is bright red, and there is a purple red mark behind the lateral operculum. The upper reaches the base of the dorsal fin and the lower reaches the ventral fin, which is particularly obvious. The operculum is lavender, the lower jaw is milky white, and the hip fin has blue patterns. It is a kind of ornamental fish and pet fish with high economic value