my female motoro that a just got has 3 of these little bastards on the underside of her disk above there little feet things, i have another ray in the tank and a rtg aro and i was wondering if they are contagious, and how fast they can get onto the other fish. this fish was quarantined but i just never saw these things, i am wondering what my options are. i can take it out of the tank and pluck them off but i don't want to stress my fish, is there any other way of getting rid of these things with little to no stress 