I currently have two stingrays(Potamotrygon cf. reticulatus.) who seem to be occasionally sucking on and bothering my eel (Mastacembelus armatus). I woke up to my eel pinned against the rock by my ray and he seemed to be sucking on her, she made no attempt to get away though. I was wondering if anyone could possibly tell me anything at all, should i take the eel out? or should it be okay?