crayfish & co

i have 2 red clawed crays who are about 6" long (without claws) and they live very happy together and share the same cave even though there are many hiding plasses and caves. they were aggressive to each other at first when there about 2" , but as soon as they reached sexual maturity they fell in love an mated and they live very happy together with there kids.

Is there a possibility that I could give my guy a friend then cause he seems so lonely now that he has no fishes to chase........?
 
well if there is ample hiding places i dont see why not..... my 2 just love each other and i cant say that every other pair will be fine. just stating what my 2 r like you never know... if possible intruduce the female last
 
That depends on the size of the species; crayfish available in the trade range from shrimp-sized Cambarellus up to foot-long Cherax. I would say a crayfish needs as much room as a similar-sized fish; just remember that it won't use the water column, so you need to provide it with lots of floor space and structure (including hiding areas), rather than open water.
 
My tank is 160cm 40cm 40cm would gambusia or fiah that live in the wild with crayfish survive with north american crayfish?
 
The gambusia might reproduce fast enough to keep up with crayfish depredation, but that's probably the best you can hope for unless you get very small crays such as Cambarellus. Then you have to worry about the gambusia picking on them (gambusia may look like guppies, but they're mean little things). It could probably work if you provide lots of cover for the crayfish to use.

If you want North American fish that will do well with the larger crayfish, such as Cambarus, Procambarus, or Orconectes, you might consider madtoms (Noturus)and sunfish (Lepomis). Even so, you will probably have some losses of fish or crays. They're just not very compatible.

Cambarellus and pygmy sunfish might be a good combination; they're both rather small and inoffensive. You could keep a few of each in a small tank (40 liters or so).
 
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