Namaste people. Would like to keep some crayfish as I find them facinating. However I have read that they eat fish in aquaria or hurt them. Does this apply only to fish smaller than the crayfish Or does it catch n hurt if not eat even fish larger than itself. Basically, are they aggressive.Converse is also true, I have aggressive fish but all juveniles. Would it be safe for the crayfish for now. I would setup another tank for them when they grow. Also what is a good tank size (floor space) for a pair of crayfish.Thanks for the help