Just like any other living thing ... Yes .
yes
I am not sure, but from what I can conclude from diagrams and from a recent dissection no, the crayfish does not have a liver. Although you should consider asking your biology teacher just to be sure.
It is when the crayfish demonstrates signs of wrestling or wanting to fight
other native crayfish :)
They use to fight hold and catch food
Crayfish hate other animals! They will even attack other crayfish if they get in the way! If u dont pay attention they will atack u!
Crayfish are not fish, and they love to eat fish if they can catch them.
No Snapper do not eat Crayfish but they eat Kiwi and other Native animals.
You can start a small war against other crayfish tanks.
If it was injured or sick it may see the other as a weakness in its community
Crayfish, crawldads
Very large peaceful fish. i would sugguest tinfoil barbs.