礁蝴蝶鱼 jiāo hú dié yú

礁蝴蝶鱼,（学名：Chaetodon sedentarius）是蝴蝶鱼科、蝴蝶鱼属鱼类。体长15厘米。体高呈卵圆形而侧扁。吻尖突，口小。鱼体上半部黄色，下半部灰白色。头部有一条黑色条带通过眼睛，背鳍后部软条有一条黑带，向下延伸经过尾柄直到臀鳍软条。尾鳍淡黄色。幼鱼的颜色有所不同，因为深色的后方区域可能会褪色，露出两个圆形斑点。

百度翻译提供：

Reef butterfly fish (scientific name: Chaetodon sedentarius) is a fish of Phalaenopsis family and Phalaenopsis genus. The body length is 15 cm. The body height is oval and flat on the side. The snout is sharp and the mouth is small. The upper part of the fish is yellow and the lower part is gray white. There is a black band on the head through the eyes, and a black band on the soft strip at the back of the dorsal fin, which extends down through the tail handle to the soft strip of the hip fin. Tail fin light yellow. The color of young fish is different because the dark rear area may fade, revealing two circular spots.