Dwarf Crayfish Versus Crayfish

So I have seen cpo and they are SO cool and cute. However I can’t put them in a tank with my dojos and common goldfish and mystery snails. The other tank I have is only five gallons. SOOOO what about dwarf crayfish? I heard that A.) they aren’t large enough to be aggressive to dojo’s or the other fish so MAYBE in my large tank and B.) if I use my other tank, 5 gallons is large enough for a dwarf. Is this true?
Which tank is best for them. The larger is 20 gallon long 30”. If I use the 5 gallon how many should I get?

I love the large ones and would have put just one in my free tank but five gallons isn’t large enough! Also has anybody seen the white crays in dwarf sizes?

 

Dwarfs can be kept in a 5g.

And they'd be a snack for a common goldfish.

So...the 5g.

And no, there are no white dwarf crayfish. Only orange, blue or grey or brown.

 

Dwarfs can be kept in a 5 gallon.

And they'd be a snack for a common goldfish.

So...the 5 gallon.

And no, there are no white dwarf crayfish. Only orange, blue or grey or brown.

What about fancies?

 

What about fancies?

Depends just how deformed a variety we're talking. Some I'd say yes, some I'd say no.

 

Depends just how deformed a variety we're talking. Some I'd say yes, some I'd say no.

Oranda, black moors, and ryukin

 

MAYBE they'd live if you had enough secure hiding places. But they'd probably get eaten while molting

 

MAYBE they'd live if you had enough secure hiding places. But they'd probably get eaten while molting

I have plenty of hiding spots for them. Right now I have three ghost shrimp. That shows you how small my goldfish are right now, and how gently they are.