[Feathers]

I've only had my Zebra Danios for about a week and a half, and one of them has been getting a progressively larger belly. I watch them eating, and the large-bellied one seems to eat no more than the others do. It looks like the fish might be pregnant, but as Danios are egg-layers, I wondered if their belly will swell before it lays eggs? I'm not entirely sure that it's eggs, since it seems like it would have had to happen right before I got them from the store, or right after.

This fish was as stream-lined as the others when I first got it, so I'm wondering if there's something else that might cause a Zebra Danio's belly to swell? The fish is still very lively (the most lively of my three, in fact) so it doesn't seem to be painful or tiring.

Thanks for your help..!