1. Different morphological characteristics

Black tiger shrimp:

The body is covered with dark brown and earthy yellow horizontal stripes. The upper beak on the forehead has 7 to 8 teeth, and the lower beak has 2 to 3 teeth. The lateral groove of the frontal horn is quite deep, extending to the back of the superior spine, but the lateral ridge of the frontal horn is low and blunt, and the central groove of the posterior ridge of the frontal horn is obvious. There is an obvious liver ridge but no frontal gastric ridge.

Based shrimp:

The body color is khaki to tan, and the swimming feet are brown or red. Except for the ridges, edges and the front and lower sides of the abdomen, there are many short hairs on the body surface, and many black spots are distributed on the body surface. The male's forehead is straight and knife-shaped, while the female's tip is slightly curved upward. The first step is to have a thorn in your seat. The frontal horn has 6 to 9 teeth. There are longitudinal ridges on the back of the first to sixth segments of the abdomen. The caudal segment has no lateral spines. The first foot has spines, but they are smaller than the basal segment spines. The top of the male copulatory organ is pointed, the base is wide, and the ventral surface is slightly triangular. The front and middle processes of the female copulatory organ are nearly elongated.

2. Different origins

Black tiger shrimp: distributed over a wide area, from southern Japan, south Korea, coastal my country, Philippines, Indonesia, Australia, Thailand, India to the eastern coast of Africa are distributed.

Jiwei shrimp: Mainly distributed in China along the coasts of Fujian, Taiwan, Guangdong and Guangxi.

3. Different living habits

Black tiger shrimp: Black tiger shrimp grows fast, has strong adaptability, has a variety of feeding habits, and has low requirements for the protein content of the bait (only about 35%). Can tolerate a wide range of salinity and temperatures. The salinity range is 0.2~70‰, and the optimal salinity is 10~20‰; the optimal temperature is 25~32℃. Death will occur if it is higher than 38℃ or lower than 14℃. It also has strong tolerance to hypoxia and can withstand dry dew for a long time, so it is easy to work and transport.

Jiwei shrimp: New Penaeus prawns have strong vitality. Adult shrimps can live in pure fresh water to seawater with a salinity of 35%. The suitable water temperature is 19~32℃. New Penaeus is omnivorous, but prefers carnivorous food. It preys on small crustaceans, cephalopods, shellfish, annelids and aquatic insects. It also eats a large amount of organic detritus, sand algae and other plants. Suitable for sandy mud substrate.