Not sure if this should go here or in the disease section, but I noticed yesterday one of my blue platys displaying some rather odd behaviour. I think its a male but can't be 100% sure on that. Anyway, he/she is swimming around fine, then all of a sudden sort of, floats on his/her side and briefly has what looks like a seizure! Then the moment passes and he/she is back to swimming around normally. There is nothing abnormal that I can see, none of the other fish are doing it, he/she is eating and otherwise behaving normally. I'm wondering if this is perhaps platy mating behaviour?? Because I have seen other platys swim up beside him/her..
Any ideas?