How many crayfish are there in eight kilos? One kilo of big crayfish is about 10, and the smaller one is about 20, so eight kilos is about 120.

Crayfish are usually a catty. There are about 10 -20 crayfish per catty. This mainly depends on the size of the crayfish. If it is a little bigger, it is estimated that there are about 10 a catty. If it's smaller, it's estimated that it's only about 20 kilograms, so it's uncertain. Crayfish are also known as Procambarus clarkii, red crayfish and freshwater crayfish. Shaped like a shrimp with a hard shell. The adult body length is about 5.6- 1 1.9 cm, which is dark red, the shell part is nearly black, and there is a wedge-shaped stripe on the back of the abdomen. Young shrimps are uniform gray, sometimes with black ripples.