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Three species of crayfish are present in Finland, Astacus astacus (Noble grayfish), Astacus leptodactylus (Danube crayfish) and Pacifastacus leniusculus (Signal crayfish), for your question about 'Why?', I can't answer anything else than the climate and water conditions are suitable for these species of crayfish.
What else can I help you with?
What is the freshwater lobster?
Crayfish
What do they call crayfish in Australia?
Crayfish are known as both crayfish and yabbies in Australia. "Yabbies" are freshwater crayfish, often found in rivers, creeks and dams in rural areas.
Is your crayfish dieing?
My older crayfish died and my littler crayfish has not yet how do/can they die?
Do crayfish have territories?
Do crayfish have tarritoris
Is a crayfish a herbavoir?
Crayfish are omnivores.
What does the exoskeleton do in a crayfish?
protects the crayfish
Does a crayfish look like a crab?
Crayfish are related to small lobsters. Here is a link for pictures of crayfish. http://mackers.com/crayfish/pics.htm
What are some good crayfish recipes?
Crayfish is also known as crawfish and it resembles small lobsters. There are some great recipes such as Crayfish Chowder, Crayfish pie, Crayfish Thermidor and Creamy Crayfish Bisque. All of these recipes can be found on the All Recipes website.
Is a crayfish an invertbrate or vertbrate?
Crayfish are invertebrates.
Is their a name for the female crayfish?
Crayfish-ess.
What does a crayfish resemble?
the crayfish resembles a lobster
Is a crayfish a molluscs?
No, a crayfish is not a mollusk. It is an arthropod.
