More specifically, orange/mexican dwarf crayfish (CPOs!). These guys are just really interesting to me and would love to know more about them. They seem to stay small, max of 1.5", have little pinchers, and hear they are less aggressive than their relatives. Does this make them compatible with most tank specimens? I have read mostly positive results in a community type of setting, as long as there is enough space and places to hide. How are they with other bottom dwellers and shrimp?