Ive had a couple of mine do that but then it went away. The botttom one looks like an elongatus of something. Not sure which without looking it up sorry.
It's ok, thanks Andy! Just glad there ok. No one else is "showing" anything.
I really love this fish and they've been with me from day one and even survived the columnaris outbreak.
It may be elongatus badzula << spelling haha it's something like that