They can stay up anytime but they are rare to find at night.
in slow moving water mostly around rocks but ..crayfish are nocturnal so your best bet is to look when the sun goes down (:
Crayfish don't hunt and catch fish. They tend to be nocturnal and prowl around at night picking up whatever they can grab. If a fish happens to be sleeping/resting on the bottom and a crayfish comes by, it would not be unusual for a crayfish to make a grab at the fish and rip a piece off it.
Crayfish
Crayfish are known as both crayfish and yabbies in Australia. "Yabbies" are freshwater crayfish, often found in rivers, creeks and dams in rural areas.
My older crayfish died and my littler crayfish has not yet how do/can they die?
Do crayfish have tarritoris
protects the crayfish
Crayfish are omnivores.
Crayfish are related to small lobsters. Here is a link for pictures of crayfish. http://mackers.com/crayfish/pics.htm
Crayfish are invertebrates.
the crayfish resembles a lobster
No, a crayfish is not a mollusk. It is an arthropod.