One, the fish bile broke when killing the fish.

Two, the black film in the belly of the fish is not clean.

Three, the production of fish soup over the materials used. Such as adding some bitter herbs and spices.

The first case of the highest probability of appearing, which lies in the skills of killing fish, if the back of the fish from the beginning of the dissection, the emergence of fish gall bladder broken case will be less; from the fish belly to start dissecting, the available knife first from the anus of the fish began to dissect upwards, fast to the front of the two pairs of fish flags (the word will not play, hehehe) two or three inches when the knife stops or slowly open upwards, this time you can see the heart of the fish, the fish liver, the gall bladder in the liver of the fish on the edge of the green liquid capsule, put them together, and then the fish will not be able to see the heart of the fish. The green liquid capsule, take them out carefully.

In case of destruction, the inside will flow out green liquid, this time must be quickly washed away, but the surface of the fish body will still have some obvious residue, can be used to gently melon knife (sorry, don't remember how to write, I use five strokes) in addition.

The fish soup can also send some wine, it is best to give the fish body parts evenly coated with a poo.

Knowing these reasons, I think you know what to pay attention to do fish soup later!

For the latter two cases here is no explanation! ......- ^-^