As the title indicates, I am interested in accquiring any type of crayfish that generally refrains from attacking its fish tank mates. I am planning to set up a 35 gallon tank for a three spot gourami and ideally, I'd like to get a crayfish as well. Apart from Mexican CPOs, are there any other crayfish species that would be able to co-exist peacefully with a three spot gourami? Thanks in advance.