i have had my black neons follow my ottos about and vice versa. i put it down to the fact that they have similar markings.
as u can see from my tank list i have a few different types of corys. they get on well with each other but i also notice that sometimes they split into groups of their own kind, mostly at night time when they are resting.
one of my cory juliis fell in love with a fat cory leucomelas and wouldnt leave her alone for ages and ages. he seems to have calmed down a bit now. either she has told him she is not interrested or he has realised she is not the same type
