The poisonous black line of angelfish is on the back of the yellow croaker, roughly in the same position as the lobster's shrimp line. The way to remove the black line: prepare a sharp thing, such as a toothpick, and pierce it from the lower end of the tail of the angelfish, wait until you can see the black line of the angelfish, and then use your hand to gently pull out the black line directly.

A, angelfish poisonous black line where

1, angelfish poisonous black line in the back of the yellow spiny fish, roughly the same location and lobster shrimp line.

2, the method of removing the black line:

(1) use a knife to cut in the tail of the angelfish, and then squeeze the back of the angelfish with your hand, the black line will slowly flow out, and then gently tug with your hand can be.

(2) Or prepare a sharp thing, such as a toothpick, from the bottom end of the tail of the angelfish stab in, wait until you can see the black line of the angelfish, use your hand to pull it out directly.

(3) When pulling the black line, the force must be very careful to avoid the black line breaking, otherwise the food residue in the digestive tract of the angelfish will enter its flesh and pollute the fish.

Two, how to identify wild angelfish

1, see the color: the appearance of wild angelfish is generally yellowish whitish; and the appearance of artificial breeding of angelfish is generally yellowish greenish-white.

2, look at the size: wild angelfish live in the natural environment, the daily amount of food can not be guaranteed, the body size is relatively small; while the artificial culture of the angelfish do not need to hunt for their own food, feed, nutrient-rich, so the body size of the relative to be larger.

3, look at the difference between the fish: capture of wild angelfish of all ages, body size varies; while the artificial breeding of angelfish are about the same size.

4, look at the meat: wild anglerfish taste fresh and sweet, tender meat; while the artificial farming of anglerfish meat is slightly rough and dry, no wild anglerfish fresh.

5, look at the belly of the fish: artificially cultured fish belly usually have a layer of dark color of the black membrane; and wild anglerfish no black membrane, or a layer of very light black membrane.

6, look at the gallbladder: the gallbladder of the artificially farmed angelfish is very large, and the bile is more and more colorful; while the gallbladder of the wild angelfish is relatively small, the bile is relatively small, and the color is relatively light.

7, look at the fat: artificially farmed angelfish body fat content is very high, and even the belly of the fish are fat-based; while the wild angelfish due to the lack of food, the body fat content is usually very low.