鳔,就是通常所说的鱼泡泡。它是鱼肚子里消化管与脊柱之间的长囊状器官,鳔内充有氧、二氧化碳、氮等气体。但不是所有的鱼都有鳔,如生活在海洋中的鲨鱼、鲐鱼、金枪鱼、比目鱼等就没有鳔。多数鱼类的鳔是单个的长囊状,可分两个室,也有一或三室的。鳔的前后室隔壁上有孔相通。少数鱼类的鳔是左右两叶,如肺鱼。 鳔, is commonly referred to as fish bubble. It is the long capsule organ between the digestive tract and the spine in the belly of the fish, filled with oxygen, carbon dioxide, nitrogen and other gases. However, not all fish have their own flesh, such as sharks, anchovies, tuna and flounder that live in the ocean. Most of the fish is a single long bladder 鳔 can be divided into two rooms, but also one or three rooms.鳔 before and after the chamber has holes connected to the wall. A few fish 鳔 is about two leaves, such as lung fish.