扳机鱼 bān jī yú Balistidae

扳机鱼（bān jī yú）是鳞鲀科约四十种浅水海产鱼类之统称，大多分布在在热带海域。它们身材扁平，好像在海里游来游去的薄煎饼。体长不超过60厘米，长着锋利的大背鳍。吃扳机鱼时要注意区分，因为有许多种类的肉是有毒的。

百度翻译提供：

Trigger fish (b ā n j ī Y ú) is the general name of about 40 species of shallow water marine fishes of Triggerfish family, most of which are distributed in tropical waters. They are flat, like pancakes swimming around in the sea. The body length is no more than 60 cm, with sharp large dorsal fins. When you eat trigger fish, you should pay attention to the distinction, because there are many kinds of meat that are poisonous.