The lifespan of wild freshwater crayfish is typically 20 months for males and 24 months for females.

Lobster is the common name for species under the arthropod phylum Mollusca decapoda order Lobsteridae. It is also known as prawn, lobster, shrimp kui, sea shrimp and so on. It is thicker cephalothorax, hard shell, colorful, short abdomen, body length is generally between 20 to 40 cm, weighing 0.5 kg up and down, part of the chela-less, abdominal limbs can evolve into chelipeds later in life. The heaviest can reach more than 5 kilograms, known as lobster tiger.

Lobster, originating in Central and South America and northeastern Mexico, now distributed in all continents of the world, a wide range of varieties, generally inhabiting the warm ocean offshore seabed or shore. China produced at least eight kinds of lobsters. The main ones are: Chinese lobster, olive-colored, produced in the coastal areas of Guangdong, the body size is larger, the production is also larger.

Aggressive

Lobsters are aggressive by nature, often appearing to bully the strong and the weak and the small for fear of the big phenomenon when there is a shortage of feed or competition for roosting holes. The regeneration ability of the larvae is strong, the loss of part of the 2nd molt regenerate part of the molt, a few moults will be restored, but the newborn part is shorter than the original. This self-cutting and regenerative behavior is a protective adaptation.