Zebra And Long-finned Danios

Hi sideing

Unfortunately Danio's aren't the easiest fish to sex - there are no obvious differences such as certain male/female specific fin shapes as you get with Platies or Guppies. I think Sue did reply to your other post, saying that females are generally rounder bellied, slightly larger and their colour is usually less intense than males, although as you only have two at present so this will make it even trickier because you could have two males or two females.

Perhaps when you get some more to make a larger group/shoal you may be able to see the differences