River shrimps include Macrobrachium japonicus, Macrobrachium vulgaris, Macrobrachium macrobrachium, crayfish, spiny-legged spoon shrimp, grass shrimp, Macrobrachium rosenbergii, clear shrimp, Australian lobster, white shrimp, golden shrimp, Ghost shrimp, crayfish. There are few varieties of river shrimp, and they generally have large heads, short bodies, long chelicerae, and wide and flat tails. There are many varieties of sea shrimps, some large and small, but they are generally long in body, short in legs, triangular in tail, and without chelicerae.

Crayfish, also known as Procambarus clarkii, red crayfish and freshwater crayfish, are freshwater economic shrimps. They are popular among people because of their delicious meat. They are omnivorous, fast growing and have strong adaptability. White shrimps are shrimps that live in warm and tropical coastal waters and freshwaters. Most of them have high economic value and are widely distributed in the Indian Ocean and the Western Pacific. They are found in coastal areas and lakes of China.

Macrobrachium japonicus likes to live in slow-flowing places covered with aquatic plants such as freshwater lakes, rivers, reservoirs, ponds, ditches, etc. In winter, it overwinters in deep water and lurks in caves, tiles, stones, branches or other places. In the grass, he has poor mobility and does not eat food.