redclaw like it warm.. i have crayfish that i got from the local bait shop (papershell crayfish) that have been doing pretty well in the unheated pool... i put the females i catch mating or in berry in a different 55 gallon tank that is at about 70f, there are some ghostshrimp in that tank too.. just got a marmokreb, in my rosy red fry tank (all the baby fish dissappeared before adding the marm), so we'll see with her..